Electronic signature on a quote

An electronic signature on a quote or contract is any digital indication that a person intends to be bound by the document - from a clicked "Accept" button to a name typed beneath terms and conditions. In the UK, electronic signatures are legally binding under the Electronic Communications Act 2000 and UK eIDAS Regulations. What decides whether a signed quote holds up in a dispute is not the technology used but the evidence it leaves behind: a record of who signed, when, from which device, and whether the document remained unchanged at the moment of acceptance.

What counts as an electronic signature on a quote

The UK eIDAS framework recognizes three tiers. A simple electronic signature - typing a name, clicking a checkbox, or signing with a finger on a touchscreen - is valid for commercial quotes and contracts. It needs only to identify the signatory and demonstrate their intent to sign. The Court of Appeal confirmed this in Golden Ocean Group Ltd v Salgaocar Mining Industries (2012), finding that even an automatically generated email signature block was sufficient to create a legally binding commercial guarantee worth tens of millions of dollars.

An advanced electronic signature adds cryptographic authentication. The signature is uniquely linked to the signatory, created using data only they control, and any subsequent change to the document is detectable. For high-value contracts or situations where identity verification carries extra weight, an advanced electronic signature reduces the risk that a dispute unravels on authentication grounds. A qualified electronic signature, the highest tier, has the legal equivalence of a handwritten signature and requires a qualified trust service provider - uncommon for everyday quote acceptance but sometimes required for regulated transactions.

For most business quotes and service contracts, a simple electronic signature is legally sufficient. The question worth asking before you send is not which tier to use but whether your process captures enough evidence to prove the signature was given.

The audit trail that makes a signed quote enforceable

A signed quote without a supporting record is harder to defend. The audit trail is the structured evidence a platform captures at the point of signature, and courts look at four things in particular.

First, identity attribution: the email address of the person who signed, confirmed against the address the quote was sent to, links the signature to the named individual. Second, a precise timestamp showing the date and time of signing. Third, the IP address from which the signing action occurred. Fourth, a document integrity record - typically a cryptographic hash - showing the document had not been altered between the time it was sent and the time it was signed.

Without these four elements, a disputed acceptance becomes a credibility question. With them, it becomes an evidential record that courts treat as more reliable than a wet-ink signature, because no equivalent metadata exists for pen and paper.

Good practice is to send both parties a copy of the signed document - with the audit record attached - immediately after acceptance. This closes off any later claim that the customer did not see, or did not understand, what they signed.

Zigaflow's contracts and quotes features let customers accept documents online and capture the acceptance record against the job. The approvals feature logs internal sign-off alongside customer-facing acceptance, and document templates ensure the version the customer signs is the version that was quoted.