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Signature law

Legal validity. EU-hosted. GDPR-compliant.

E-Signing.io uses the simple (SES) and advanced (AES) electronic signature under eIDAS — documented with an audit trail, timestamp and document hash. Here you'll find a transparent assessment of which contracts can be signed with legal validity this way.

This page does not replace legal advice.
EU-hosted GDPR-compliant eIDAS-ready

eIDAS signature levels

SES or AES — which fits you?

SES

SES — Simple electronic signature

For most everyday contracts

  • Signature data is logically linked to the document
  • IP hash, timestamp and user agent recorded in the audit trail
  • Sufficient for quotes, NDAs, freelancer contracts, invoices, sales agreements
AES

AES — Advanced electronic signature

Clear identity verification of the signer

  • One-time code by SMS or email before signing
  • Code, channel and time are recorded in the audit trail
  • Recommended for leases, permanent employment contracts, sales contracts, licence agreements

Use cases

What can you sign with it?

Most B2B and B2C contracts can be signed digitally with legal validity using SES or AES. Where the law requires written form, those specific form requirements still apply.

SES
  • Quotes
  • Sales agreements
  • NDAs
  • Freelancer contracts
  • Invoices
  • Internal approvals
  • Coaching agreements
  • Service agreements
AES
  • Permanent employment contracts
  • Leases
  • Licence agreements
  • Sales contracts
  • Private loan agreements
  • Customer contracts with evidentiary risk
  • Amendments

Chain of evidence

From sending to public verification

Step 1

Send

You choose SES or AES per document and define the channels for the recipient in the editor.

Step 2

Identify

With AES, the signer receives a 6-digit code by SMS or email before the signature is released.

Step 3

Seal

After the final signature, the PDF is hashed and anchored with an RFC-3161 timestamp at an independent authority.

Step 4

Verify

At any time, a copy of the PDF can be uploaded on /en/verify to check the hash and timestamp.

Frequently asked questions

E-Signing.io creates electronic signatures under eIDAS. SES and AES can be used with legal validity for most contracts. Where the law requires written form, those specific form requirements still apply. This page does not replace legal advice for individual cases.

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