A client baulks at signing an NDA electronically because 'it might not hold up in court'. They're decades behind the law. E-signatures have been legally binding in the UK since 2000, the US since 2000, the EU since 2014, and pretty much everywhere else since.
The general rule
In nearly every developed legal system, an electronic signature has the same legal effect as a wet-ink one, provided three things are true:
1. The signer intended to sign. 2. The signer can be identified or attributed to the signature. 3. The signed document is the one they intended to sign.
This is the principle behind ESIGN (US), eIDAS (EU/UK), Australia's Electronic Transactions Act, Canada's PIPEDA, India's IT Act, and dozens of equivalents.
Where it doesn't apply
A short list of exceptions exists in most jurisdictions:
- Wills and testamentary instruments in most places. - Some real estate instruments — varies by jurisdiction, narrowing over time. - Court orders and certain official notices. - Adoption, divorce and family law documents in some places. - Specific regulated forms — HMRC inheritance tax, some FDA filings.
For the 99% of contracts, employment paperwork, NDAs, consumer agreements and supplier deals, e-signatures are fine.
Court enforceability
Courts in the UK, US, EU and Commonwealth have repeatedly upheld electronic signatures over the last two decades. Disputes usually aren't *whether* the signature is valid — they're about whether the person actually signed.
That's why audit trails matter: IP address, timestamp, document hash, identity verification. Flint's signing tool records the signing action with these details, giving you evidence if the signature is later challenged.
Best practice for binding signatures
Use a tool that produces an audit trail. Get explicit consent to e-sign at the start (some jurisdictions require it for consumer contracts). Keep the signed PDF and the audit trail together. Don't edit the document after signing — that invalidates the signature on most platforms, including Flint.
For very high-stakes contracts — say, a property purchase or an executive employment agreement — consider an advanced or qualified signature with stronger identity proof.
FAQ
Have e-signatures been challenged in court?
Many times. They generally win, provided the audit trail is intact. Disputes more often centre on whether the signatory was authorised, not whether the e-signature itself counts.
Can I use an emoji as a signature?
There's case law in the UK and Canada accepting unusual marks as signatures provided intent is clear. Don't push your luck — use a name or recognisable signature.
Is a 'click to agree' button a signature?
Yes, generally. Courts have repeatedly held clickwrap consent to be binding, provided the terms were reasonably presented.
Do I need a notary for an e-signature?
Almost never. Notarisation is a separate process for documents that need it (some affidavits, certain real-estate filings). Most contracts don't need notarisation in any form.
Stop worrying about whether they'll hold. Sign your next PDF in Flint and move on.