Are electronic signatures legally binding? ESIGN, UETA, and what makes a signature hold up
Yes — under the US ESIGN Act and UETA, electronic signatures are legally binding for most business documents. Here's what the law requires and why the audit trail matters.
Short answer: yes. In the United States, electronic signatures have carried the same legal weight as ink for most business documents since the year 2000. The longer answer — the one that matters when a signed agreement is ever challenged — is that a signature is only as strong as the evidence behind it. Here's the legal foundation in plain English, and what to look for in the tool you use. (This is general information, not legal advice; for a specific situation, ask a lawyer.)
The two laws that make e-signatures valid
- The ESIGN Act (2000) — a federal law establishing that a contract or signature "may not be denied legal effect, validity, or enforceability solely because it is in electronic form."
- UETA — the Uniform Electronic Transactions Act, adopted by nearly every state, which does the same at the state level and defines what counts as an electronic signature and record.
Together they mean an electronic signature is not a second-class signature. Courts have enforced e-signed agreements for decades. The question in a dispute is almost never "was it electronic?" — it's "can you prove who signed, that they intended to sign, and that the document hasn't changed since?"
What the law actually requires
Four things, in plain terms:
- Intent to sign. The signer took a deliberate action — clicking to sign, drawing or adopting a signature.
- Consent to do business electronically. The signer agreed to use electronic records, and that consent was captured.
- Attribution. The signature can be connected to the person — the email address it was sent to, the time, the device, the IP.
- Record integrity and retention. The signed document is preserved, reproducible, and demonstrably unaltered since signing.
A signature tool's job is to make all four automatic. On Signed, consent capture is built into the signing flow, and every action — sent, viewed, signed, completed — is logged with the signer's email, timestamp, and IP address, then sealed into a tamper-evident Certificate of Completion attached to the final PDF. That certificate is the evidence file; what's in it is detailed in the audit trail explainer and Audit trail & certificate.
The exceptions worth knowing
A small set of documents is commonly carved out of ESIGN/UETA — wills and testamentary trusts, certain family-law documents, court orders, and some notices tied to housing, insurance cancellation, or product recalls. Some documents also require notarization, which is a separate process from e-signature. For everyday business agreements — sales contracts, engagement letters, leases, NDAs, offer letters, invoices with sign-off — electronic signatures are standard and enforceable.
A note on US vs EU
The rules above are US law. The EU has its own framework (eIDAS) with tiers of signature, including "qualified" signatures that require certified providers. Signed is built for US ESIGN/UETA transactions — we say so plainly rather than hand-waving global compliance. If you specifically need EU qualified signatures, use a provider certified for them.
What this means when choosing a tool
Legal validity doesn't come from a brand name — signatures from any compliant tool rest on the same two laws, so paying enterprise rates doesn't buy you a more binding signature. What differs is price and scope: the comparison is in the DocuSign alternative post and on pricing. Send your next agreement and watch the audit trail build itself — getting started takes five minutes.