Is an Electronic Signature Legally Binding?

This is the question that stops people signing on a phone, and the short answer is that for ordinary agreements an electronic signature is generally valid in most jurisdictions. The longer answer is worth knowing, because the exceptions are real and the reasoning is not what most people expect.

What follows is general information, not legal advice. If a lot turns on the document, ask someone qualified in your jurisdiction.

What the law actually cares about

The frameworks — the US ESIGN Act and UETA, the EU's eIDAS regulation, the UK's Electronic Communications Act, and equivalents elsewhere — broadly converge on the same tests. They care whether the signer intended to sign, whether they consented to doing it electronically, whether the signature is attributable to them, and whether the record can be retained and reproduced.

Notice what is absent: nothing in that list is about whether the mark looks like your handwriting. A drawn signature, typed name, or a click of an "I agree" button can all satisfy it. The format is not the point — the intent and the attribution are.

The exclusions

These vary by jurisdiction, but the commonly excluded categories are consistent enough to be worth naming: wills and testamentary trusts, some family-law documents such as divorce and adoption papers, certain property transfers and deeds, court filings with their own procedural rules, and some notices — eviction, utility termination, insurance cancellation. Anything requiring notarisation or a witness has additional requirements that a drawn signature alone does not meet.

Why plain e-signatures usually hold up anyway

In practice most agreements are never challenged, and when one is, the argument is rarely about the signature's format. It is about whether that person agreed. Emails, timestamps, payment records and conduct afterwards all bear on that, and often weigh more than the mark itself.

Where a plain drawn signature is weaker is proving who made it. A drawn mark on a PDF carries no cryptographic identity. That is what qualified or certificate-based digital signatures add, and they are a different product from marking up a PDF.

A practical rule

• If the document says how it must be signed, follow that.
• If it is in an excluded category, or needs a notary or witness, do not rely on a drawn signature.
• If a lot of money or a long commitment turns on it, use a service that produces an audit trail.
• For everything else — the overwhelming majority of forms people are sent — signing on your phone is fine.