People who sign a contract rarely think about its form. The law thinks about it a great deal, and precisely where a dispute becomes expensive: ending an employment relationship, issuing a suretyship, signing a long-term lease. For the vast majority of business correspondence, by contrast, no form is prescribed at all. Three forms of the German Civil Code carry the day-to-day weight: the written form with a handwritten signature (Section 126(1) of the German Civil Code), the electronic form with a qualified electronic signature (Section 126a(1) of the German Civil Code) and the text form as a legible declaration on a durable medium (Section 126b of the German Civil Code). Alongside them, a publicly certified declaration also counts as a declaration in written form, and notarial recording replaces the written form (Section 126(4) and (5), German Civil Code). Alongside this, the European eIDAS Regulation defines three signature levels (Article 3 points 10 to 12, Regulation (EU) No 910/2014). The two systems do not map onto each other one to one, and that gap is where the expensive misunderstandings live: a tick box is an electronic signature within the meaning of the Regulation, yet it does not satisfy the statutory written form. This article maps the levels onto the forms, names the cases in which the electronic form remains excluded, and describes how a company makes this decision once instead of renegotiating it in every single case.
Key takeaways
- Three forms matter in day-to-day work: written form with a handwritten signature (Section 126(1)), electronic form with a qualified signature (Section 126a(1)) and text form on a durable medium (Section 126b, all German Civil Code); public certification and notarial recording also satisfy the written form (Section 126(4) and (5)).
- The eIDAS Regulation distinguishes three signature levels (Article 3 points 10 to 12). Only the qualified electronic signature has the equivalent legal effect of a handwritten signature (Article 25(2), eIDAS Regulation).
- The advanced signature meets four requirements (Article 26, eIDAS Regulation): unique linkage to the signatory, identification of the signatory, sole control over the creation data and detectability of subsequent changes. Even so, it does not satisfy the statutory written form.
- For the termination of employment relationships (Section 623) and for a declaration of suretyship (Section 766 sentence 2, both German Civil Code) the law expressly excludes the electronic form. No procedure changes that.
- Where the form is agreed by contract rather than required by law, the contract decides: for an agreed electronic form a signature other than the qualified one is sufficient (Section 127(3) sentence 1, German Civil Code).
Three forms in day-to-day business
The strictest of these three is the written form. Where it is prescribed by statute, the document must be signed by the issuer in their own hand by adding their name, or by means of a notarially certified mark (Section 126(1) of the German Civil Code). In the case of a contract, the parties must sign the same document; where several identical documents are drawn up, it is sufficient for each party to sign the copy intended for the other party (Section 126(2) of the German Civil Code). That also settles what the written form is not: not a scan, not a photograph of a signature, not an image file pasted into a PDF. Besides a handwritten signature, two further routes lead to the written form: a publicly certified declaration also counts as a declaration in written form, and notarial recording replaces the written form (Section 126(4) and (5), German Civil Code). This article does not pursue those two routes further; it describes the decision between paper, electronic form and text form.
The electronic form is the substitute the law itself provides. Where the prescribed written form is to be replaced by it, the issuer of the declaration must add their name and provide the electronic document with their qualified electronic signature (Section 126a(1) of the German Civil Code). In the case of a contract, the parties must each sign an identical document in that manner (Section 126a(2) of the German Civil Code). The word qualified here is not a marketing term but a definition taken from the eIDAS Regulation, and validity turns on it.
The text form is the lowest level and in practice the most common. Where it is prescribed by statute, a legible declaration naming the person making it must be provided on a durable medium (Section 126b of the German Civil Code). It requires no signature at all. An email that names the sender, a PDF in a customer account, a letter without a signature: all of these can be text form, as long as the declaration can be reproduced unchanged and retained.
Form and security are two separate questions
The three signature levels of the eIDAS Regulation
Alongside German form law, a European regulation defines what an electronic signature actually is. It distinguishes three levels. The simple electronic signature is data in electronic form which is attached to or logically associated with other data in electronic form and which is used by the signatory to sign (Article 3 point 10, eIDAS Regulation). That definition is deliberately broad: a scanned signature falls under it, and so does a tick in a form. The advanced electronic signature is an electronic signature which meets the requirements of Article 26 (Article 3 point 11, eIDAS Regulation). The qualified electronic signature is an advanced electronic signature that is created by a qualified electronic signature creation device and which is based on a qualified certificate for electronic signatures (Article 3 point 12, eIDAS Regulation).
| What is signed | What is required | Which form this satisfies | Reference |
|---|---|---|---|
| Simple electronic signature | data in electronic form used by the signatory to sign | text form, where the person declaring is named and a durable medium exists | Article 3 point 10 (eIDAS Regulation) |
| Advanced electronic signature | unique linkage, identification, sole control, detectability of changes | text form and an agreed electronic form, not the statutory written form | Article 3 point 11 and Article 26 (eIDAS Regulation) |
| Qualified electronic signature | qualified certificate and qualified signature creation device | statutory electronic form, replaces the written form | Article 3 point 12 (eIDAS Regulation), Section 126a(1) (German Civil Code) |
| Handwritten signature on paper | signature by name or notarially certified mark | written form | Section 126(1) (German Civil Code) |
| Legible text without a signature | the person declaring is named, durable medium | text form | Section 126b (German Civil Code) |
| Agreed written form | transmission by telecommunication, exchange of letters for a contract | the agreed written form | Section 127(2) sentence 1 (German Civil Code) |
| Agreed electronic form | a signature other than the qualified one, exchange of offer and acceptance for a contract | the agreed electronic form | Section 127(3) sentence 1 (German Civil Code) |
The four requirements of Article 26 (eIDAS Regulation) are the substance of the middle level: the signature is uniquely linked to the signatory, it is capable of identifying the signatory, it is created using electronic signature creation data that the signatory can, with a high level of confidence, use under their sole control, and it is linked to the data signed in such a way that any subsequent change in the data is detectable. Reading those four points shows the purpose: linkage and detectability of changes, not an official determination of identity.
The difference from the highest level lies in the legal consequence. An electronic signature shall not be denied legal effect and admissibility as evidence in legal proceedings solely on the grounds that it is in an electronic form or that it does not meet the requirements for qualified electronic signatures (Article 25(1), eIDAS Regulation). At the same time, a qualified electronic signature has the equivalent legal effect of a handwritten signature (Article 25(2), eIDAS Regulation). Taken together, those two sentences produce the division of labour this article is about: every level is usable, but only one replaces the signature.
Which signature satisfies which form
The mapping is simpler than it sounds, once you start from the form rather than from the product. If the law requires text form, no signature is needed. If it requires the written form, either paper with a handwritten signature or a document carrying a qualified signature will do. If it requires nothing at all, the company decides for itself what evidence it wants to be able to produce later - and that decision is commercial, not legal.
The expensive mistake sits in the middle case. An advanced signature looks demanding, because a certificate, an identity check and a validation report are involved. It still does not satisfy the statutory written form, because Section 126a(1) of the German Civil Code expressly requires the qualified signature. Conversely, the effort of a qualified signature is as a rule not justified for a case that only needs text form.
- Record of the essential terms of employment: the record may be drawn up in text form and transmitted electronically, provided the document is accessible to the employee, can be stored and printed and the employer asks the employee, when transmitting it, to confirm receipt (Section 2(1) sentence 2 of the German Act on the Proof of Essential Conditions Applicable to the Employment Relationship).
- Notice of termination and termination agreement: paper with a handwritten signature, with no electronic alternative (Section 623, German Civil Code).
- Employment reference: the electronic form is possible, but only with the employee's consent (Section 109(3) of the German Trade Regulation Act; Section 630 sentence 3, German Civil Code).
- Quotations and order confirmations in business dealings: as a rule no form is prescribed; here the question is not what the law demands but what has to be provable later - see the article From enquiry to order: quotes and follow-up.
- Internal approval of a purchase order or invoice: no form prescribed, but a log is required for other reasons - see Digitising approval workflows.
- Lease of land or commercial premises for longer than one year: text form is sufficient, otherwise the lease is deemed to run for an indefinite period (Section 578(1) sentence 2, German Civil Code).
This list does not replace an assessment of the individual case, but it shows the pattern: the cases with a genuine form requirement are few and settled. By far the larger part of a company's correspondence is form-free. There, the signature question is a trade-off between effort and evidential need, and it can be answered for whole document types at once.
Where the electronic form stays excluded
The general rule fits into a single sentence: the written form may be replaced by the electronic form, unless the law provides otherwise (Section 126(3) of the German Civil Code). The subordinate clause carries the weight. In several places the law does provide otherwise, and that is exactly where an otherwise fully digital workflow ends.
The most important case in practice is the termination of employment relationships. Notice of termination and a termination agreement require the written form to be effective; the electronic form is excluded (Section 623, German Civil Code). A notice sent by email is therefore ineffective, however carefully it was signed. Likewise, issuing a declaration of suretyship in electronic form is excluded (Section 766 sentence 2, German Civil Code) - a point regularly overlooked with rent deposits and in lending.
For leases, the position has been split in two since the Fourth Bureaucracy Relief Act (Federal Law Gazette 2024 I No. 323). If a residential lease for longer than one year is not concluded in written form, it is deemed to have been concluded for an indefinite period (Section 550 sentence 1, German Civil Code). For leases of land and of premises that are not residential premises, that provision applies with the proviso that a lease not concluded in text form for longer than one year is deemed to run for an indefinite period (Section 578(1) sentence 2, German Civil Code). For a commercial lease, text form is therefore sufficient; for residential leases the written form remains.
Form decision per document type
1 Does a statute prescribe a form?
no -> no form required, choose evidence by business need
yes -> go to 2
2 Which form does it prescribe?
text form -> legible declaration, person declaring named,
durable medium (Section 126b BGB)
no signature required
written form -> go to 3
3 Is the electronic form permitted?
termination of employment -> excluded (Section 623 BGB)
suretyship declaration -> excluded (Section 766 BGB)
residential lease > 1 year -> written form (Section 550 BGB)
otherwise -> go to 4
4 Implement the electronic form
issuer's name inside the document (Section 126a(1) BGB)
qualified electronic signature (Section 126a(1) BGB)
contract: both sides, identical document (Section 126a(2) BGB)
5 Form agreed by contract only?
agreed written form -> transmission by telecommunication is
sufficient (Section 127(2) sentence 1 BGB)
agreed electronic form -> another signature level is sufficient
(Section 127(3) sentence 1 BGB)
Result: paper | qualified signature | text form without a signature
Note: a publicly certified declaration also counts as a declaration in
written form, and notarial recording replaces the written form
(Section 126(4) and (5) BGB). Both routes lie outside this workflow.This tree fits on one page and is walked once per document type, not once per case. The result belongs in a list that sales, human resources and accounting maintain together. As long as that list is missing, the question is asked again for every single document and is usually answered in favour of paper, because paper is the route everyone knows.
Agreed form: what the contract itself can settle
Besides the statutory form there is the agreed one: two parties record that declarations are to be made in writing or electronically. For that case the law is considerably more generous. To comply with a written form determined by legal transaction, transmission by telecommunication and, in the case of a contract, an exchange of letters is sufficient, unless a different intention is to be assumed (Section 127(2) sentence 1 of the German Civil Code). A written-form clause in your own template therefore does not demand the same thing as a statutory written form.
The same applies to an agreed electronic form: unless a different intention is to be assumed, an electronic signature other than the one specified in Section 126a is also sufficient, and in the case of a contract the exchange of a declaration of offer and a declaration of acceptance, each provided with an electronic signature (Section 127(3) sentence 1 of the German Civil Code). In practice that means: where a form clause sits in your own contract and no statute forces it, the route to a simple or advanced signature is open, provided the clause itself does not close it.
No form is the normal case
Most correspondence is subject to no statutory form. There the company decides what evidence it will need later and can choose the level by effort and risk.
Qualified only where needed
The qualified signature is fixed for the statutory electronic form (Section 126a(1), German Civil Code). Below that it is permitted, but rarely the most economical route.
Two sides, two signatures
In the case of a contract the parties must each sign an identical document (Section 126a(2), German Civil Code). Two versions that differ in substance do not satisfy the form.
Text form without a signature
The text form requires a legible declaration naming the person declaring, on a durable medium (Section 126b, German Civil Code), and nothing more. Signing here solves no legal problem.
The validation report belongs with it
The result of the signature check is recorded at the time of signing and filed with the document, because certificates and revocation lists are not kept available indefinitely.
Put the exclusions on a list
Notice of termination, termination agreement and declaration of suretyship stay on paper (Sections 623 and 766 sentence 2, German Civil Code). A short list next to the workflow prevents the most expensive mistake.
Once this mapping exists, a permanent legal question turns into a setting inside the workflow. The route there runs through an inventory: which document types arise at all, who creates them and where do they end up? That is the same stocktake as in document digitisation, just with one additional column for the form.
What counts in a dispute
German civil procedure attaches its own evidentiary rule to the qualified signature. The provisions on the evidentiary value of private documents apply accordingly to private electronic documents bearing a qualified electronic signature or a notarially certified electronic signature (Section 371a(1) sentence 1 of the German Code of Civil Procedure). A document carrying a qualified signature therefore stands very close to a signed paper document in proceedings.
The second sentence has even more effect in practice: the appearance of authenticity of a declaration present in electronic form, arising from the verification of the qualified electronic signature, can be rebutted only by facts giving rise to serious doubt that the declaration was made by the person responsible for it (Section 371a(1) sentence 2 of the German Code of Civil Procedure). Anyone disputing the signature must therefore offer more than the dispute itself. The lower levels have no such rule; there, what counts is the logs and surrounding circumstances a company can produce.
Validation record per signed document - what is retained
Document
file name and checksum of the signed original
document type from the form list (none | text | written)
Signature
level simple | advanced | qualified
signatory name taken from the certificate
time time of signing, time stamp if present
Verification at the time of signing
certificate chain resolved to the trusted list? yes | no
revocation status queried for that moment? yes | no
document unchanged since signing? yes | no
time of verification and result in plain text
Filing
original, validation record and form decision in the same case
retention period derived from the type of document, not from
the signature levelThe validation record is the part most often missing in practice. A signature that is valid today becomes harder to verify years later, because certificates expire and revocation lists are not kept available indefinitely. Recording the result of the check at the time of signing and retaining it together with the document leaves a defensible statement later, even once technical re-verification has become more laborious.
The most common pitfalls
The first pitfall is the scanned signature. It looks like a signature and is legally an image file. For form-free cases that is unproblematic; for the statutory written form it is not sufficient, because Section 126(1) of the German Civil Code requires a signature made in the signatory's own hand. The second is confusing the signature level with the size of the user interface: whether a signature is qualified follows from the certificate and the signature creation device (Article 3 point 12, eIDAS Regulation), not from how elaborate the signing experience looks.
The third concerns the order of signing in a contract: in the case of a contract the parties must each sign an identical document electronically (Section 126a(2) of the German Civil Code). Two versions differing in substance, signed one after the other, do not satisfy the form. The fourth is the form clause in your own template: leaving it in place although no statute demands it blocks your own digitisation - at a point that a contract amendment can fix and that needs no technology at all.
The exclusion sits in the statute, not in the procedure
Rolling it out: step by step
Roll-outs typically fail less on the technology than on the missing mapping. As long as it is unclear which document type needs which form, every department decides for itself. The result is a stock of paper, PDFs and signatures at three levels that gives nobody a clear answer later. The following order has proved itself because it begins with the cheapest work and puts the technology last.
Step 1: record the document types
For four weeks, note which documents reach or leave the company and who creates them. The result is a list of types - quotation, order confirmation, employment contract, notice of termination, reference, lease, suretyship - not a list of files. Typically the number of types turns out to be well below the figure estimated in the first conversation.
Step 2: determine the form per type
Each type receives one of three entries: no form, text form, written form. The basis is the decision tree in this article and, in case of doubt, legal advice on the individual case. The column next to it records whether the electronic form is excluded (Sections 623 and 766 sentence 2, German Civil Code).
Step 3: review your own clauses
Contracts, general terms and order forms are checked for form clauses. Where only an agreed form is present, the route to a lower level is open (Section 127(2) sentence 1 and (3) sentence 1, German Civil Code). Changing your own templates costs coordination and no licence.
Step 4: fix the signature level per type
Only now does the conversation turn to procedures. For the text form, traceable delivery with confirmation of receipt is enough; for the statutory electronic form the qualified signature is fixed (Section 126a(1), German Civil Code). In between sits the advanced signature for agreed forms and for cases with a heightened evidential need.
Step 5: settle filing and validation
The signed original, the verification result and the form decision belong in the same case and under the same retention period. Regulating the filing only after the roll-out produces documents whose signature nobody can retrace later - see Getting started with document management.
Step 6: document the decision
The form list, the exclusion list and the verification procedure belong in your process documentation. That keeps it traceable years later why a document was signed one way and not another, and it keeps the list maintainable when a rule changes.
For four weeks, note which documents reach or leave the company and who creates them. The result is a list of types - quotation, order confirmation, employment contract, notice of termination, reference, lease, suretyship - not a list of files. Typically the number of types turns out to be well below the figure estimated in the first conversation.
Each type receives one of three entries: no form, text form, written form. The basis is the decision tree in this article and, in case of doubt, legal advice on the individual case. The column next to it records whether the electronic form is excluded (Sections 623 and 766 sentence 2, German Civil Code).
Contracts, general terms and order forms are checked for form clauses. Where only an agreed form is present, the route to a lower level is open (Section 127(2) sentence 1 and (3) sentence 1, German Civil Code). Changing your own templates costs coordination and no licence.
Only now does the conversation turn to procedures. For the text form, traceable delivery with confirmation of receipt is enough; for the statutory electronic form the qualified signature is fixed (Section 126a(1), German Civil Code). In between sits the advanced signature for agreed forms and for cases with a heightened evidential need.
The signed original, the verification result and the form decision belong in the same case and under the same retention period. Regulating the filing only after the roll-out produces documents whose signature nobody can retrace later - see Getting started with document management.
The form list, the exclusion list and the verification procedure belong in your process documentation. That keeps it traceable years later why a document was signed one way and not another, and it keeps the list maintainable when a rule changes.
The first three steps cost coordination and no licence. They typically prevent the larger part of the later friction, because they take the question out of the individual case. Where personnel records are involved, access should be considered at the same time; see the article Digital personnel files: access, retention and proof.
The list is the work, not the signature
Retaining documents and proving them years later
- The signed original is retained unchanged. Any conversion - printing it and scanning it back in, for instance - breaks the link to the signed data and with it the statement the signature makes (Article 26, eIDAS Regulation).
- The verification result at the time of signing is stored with it, because a later check depends on certificates and revocation lists that are not kept available indefinitely.
- The retention period follows from the type of document and not from its signature level - see the article Meeting retention periods digitally.
- Where records matter for tax or commercial law, the requirements on immutability apply on top; see GoBD-compliant document storage.
- If a data subject requests access, the records have to be findable without anyone leafing through folders - see Handling data subject access requests.
- The form decision per document type is dated and reviewed whenever a statute changes; the Fourth Bureaucracy Relief Act (Federal Law Gazette 2024 I No. 323) showed that the requirements for individual contract types can shift.
What these points have in common is not the signature but the filing. A document whose signature is impeccable but which sits in the mailbox of someone who has left the company is worth the same in a dispute as a lost sheet of paper. The form question is only answered once both parts are settled: which form applies and where the result is kept.
The question is rarely whether you may sign electronically. The question is which form a case belongs to - and the answer sits in a list that a company writes once and then maintains.
Sources and studies
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