Help
Answers to the most common questions.
Do the people I send documents to need an account?
No. They receive a secure link by email, review the document and sign in their browser — on a phone or a computer.
What file types can I upload?
PDF, JPG and PNG today. Images are converted to PDF so every signer sees exactly the same document. Word documents are coming soon.
How do I know a signed document hasn't been changed?
Every completed document is sealed with a digital signature and a SHA-256 fingerprint. Anyone can check a copy on our Verify page — any change to the file produces a different fingerprint.
Are electronic signatures legally binding?
Many countries recognise electronic signatures for many kinds of documents, but the rules vary by country and document type. Some documents need a wet signature or witnessed signing. If you're unsure, check with a legal professional for your situation.
Can I complete a witnessed signing from another country?
Often, yes. Whether a Signing Officer can help depends on the Signing Officer's commission and where you are during the video session. Tell us where you'll be and we'll only match you with Signing Officers who are allowed to help. Some places don't allow witnessed signing yet.
Security
- Passwords are stored using the argon2id hashing algorithm — never in plain text.
- Signing links are random, personal to each signer, and stop working when a document is completed, cancelled or expired.
- Documents are stored privately and downloaded only through short-lived links.
- Every important action is written to a tamper-evident audit trail.
- Completed documents are digitally signed and fingerprinted (SHA-256) so changes can be detected on our Verify page.
Privacy
What we collect: your name, email and password (hashed) when you register; documents you upload; names and email addresses of the people you invite; and, when someone signs, their IP address, browser and the time of each action.
Why: to deliver documents, prove who signed what and when, and keep your account secure.
Retention: completed documents and their audit records may need to be kept for legal and evidential reasons even if an account is closed. We keep only what is needed, for as long as it is needed.
Questions or data requests: contact support@contractsign.local.