Electronic Signature Authentication: Proving Signer Identity

Balancing Signer Security with Workflow Velocity

A central challenge in electronic contracting is establishing reliable proof of signer identity without imposing so much friction that recipients abandon the agreement. For the vast majority of standard business contracts, email verification provides strong, practical authentication.

SignCEO dispatches an individualized, cryptographically signed access token directly to the recipient’s private email inbox. To access and execute the document, the signer must have control over that specific email account.

At the moment of signing, SignCEO records the signer’s IP address, network timestamp, and browser metadata into the permanent audit trail, establishing verifiable circumstantial evidence of identity.

• Email-based token authentication verifies access to private recipient inboxes
• Session tokens prevent unauthorized sharing or search engine crawling of private files
• Forensic recording of IP addresses, device types, and exact UTC execution timestamps
• Satisfies statutory attribution requirements under the ESIGN Act and state UETA laws

Attribution Under State and Federal Law

Under UETA § 9, an electronic signature is attributable to an individual if it was the act of the person. Documenting email delivery and matching IP records provides admissible evidence supporting attribution.