For decades, a fax with a handwritten signature was considered legally binding — often more so than email. Now that signatures are applied digitally before faxing, a common question arises: is that still legal? The short answer is yes — and here's why.
The Legal Foundation: E-SIGN and eIDAS
The legal acceptance of electronic signatures varies by country, but two landmark frameworks cover most of the world:
United States — The E-SIGN Act (2000)
The Electronic Signatures in Global and National Commerce Act (E-SIGN) gives electronic signatures the same legal weight as handwritten ones for most commercial transactions. This means a signature you draw on your iPhone screen and fax to a recipient is legally equivalent to signing with a pen — in most contexts.
European Union — eIDAS Regulation (2016)
The eIDAS Regulation establishes a framework for electronic identification and trust services across EU member states. It defines three levels of electronic signature, with the basic "electronic signature" level covering drawn signatures like those in FaxDoc.
Other Countries
Most developed countries have passed similar legislation: Canada's PIPEDA, the UK's Electronic Communications Act, Australia's Electronic Transactions Act, and many others. In virtually all cases, a drawn digital signature on a faxed document is considered legally valid for standard commercial and personal documents.
What Makes a Digital Signature on a Fax Valid?
For a digitally signed fax to hold up legally, it generally needs to meet a few criteria:
- Intent to sign — the signer deliberately applied their signature to the document
- Consent — the signer agreed to use electronic means
- Association — the signature is clearly linked to the document
- Record keeping — a record of the signed document exists (FaxDoc keeps transmission history)
When you sign a document in FaxDoc and send it by fax, all four of these criteria are naturally satisfied.
Industries That Accept Digitally Signed Faxes
Healthcare
Medical providers, insurance companies, and pharmacies routinely accept faxed forms with digital signatures — from referrals and authorization forms to HIPAA release forms. In fact, fax remains the most widely used transmission method in US healthcare specifically because of its established legal standing.
Legal & Real Estate
Law firms and real estate agencies have embraced digitally signed faxes for routine documents: engagement letters, NDAs, lease agreements, and purchase offers. Always check with your specific counterpart, as some documents (like wills and powers of attorney) may still require notarized wet signatures.
Government & Financial
Many government agencies — tax authorities, licensing boards, benefit offices — still accept faxed forms. Banks and financial institutions often use fax for loan documents, account changes, and wire transfer authorizations.
When a Digital Signature on a Fax May NOT Be Sufficient
There are important exceptions. Digital signatures (including those on faxes) are generally not sufficient for:
- Wills and testamentary documents (in most jurisdictions)
- Adoption papers and certain family law documents
- Notarized documents (a notary's physical seal and presence are required)
- Court filings that require original signatures
- Certain real estate deeds (jurisdiction-specific)
When in doubt, confirm with the receiving party what signature format they accept before sending.
How FaxDoc Handles Signatures
FaxDoc lets you draw your signature directly inside the app using your finger or Apple Pencil. The signature is embedded as a visual element into your document before transmission — just like it would appear if you'd signed a printed page.
The transmitted fax is indistinguishable from a traditionally signed document. The recipient's fax machine prints it the same way it would any other fax — which is exactly why fax remains a trusted medium for signed documents.
Best Practices for Signed Faxes
- Keep your transmission history — FaxDoc logs all sent faxes with timestamps. This serves as your evidence of transmission if ever challenged.
- Confirm receipt — follow up by phone or email to confirm the recipient received and can read the document.
- Save the original document — keep a copy of the signed document in Files or iCloud before sending.
- Know your counterpart's requirements — always check whether the receiving institution has any specific requirements before faxing a signed document.
The Bottom Line
For the vast majority of everyday business, healthcare, legal, and personal documents, a digital signature applied before faxing is fully legally valid in the US, EU, and most other countries. FaxDoc makes this workflow seamless — sign on your phone, send instantly, and get a delivery confirmation — all without touching a printer.