Sign documents on mobile
Signers sign on their phone without installing anything — just click the link and sign.
How mobile signing works
Send the signing request
Upload your document and enter the signer's email. BuiltSign sends a signing link — works on any device.
Signer opens on mobile
The signing link opens in the mobile browser. No app download, no login. The document is displayed clearly on any screen size.
Sign with a finger or stylus
Draw a signature with a finger or type your name. The signature is captured and the document is certified instantly.
Benefits of mobile signing
No app required
Signers click a link in their email and sign in their browser. Works on iPhone, Android and any mobile browser.
Full audit trail on mobile signatures
Mobile signatures include the same timestamp, IP address and email verification as desktop signatures.
Sign anywhere, anytime
Property agents, field workers and clients on the go can sign without ever being near a computer.
Who signs on mobile?
Real estate
Tenants and landlords sign rental agreements from their phones — no need to schedule an in-person meeting.
Field services
Technicians get client sign-offs on service reports on-site, directly on a mobile device.
Questions about mobile signing
- No. Signing works entirely in the mobile browser. No app, no account, no download required.
- Yes. eIDAS SES does not distinguish between desktop and mobile signatures. Both carry the same legal weight.
- Yes. BuiltSign's signing page is optimised for mobile performance and works on any modern smartphone browser, including older models.
- Yes. A drawn signature on mobile is a valid SES under eIDAS, as long as it is linked to the signer's authenticated email address.