Use Case
E-Signatures for Legal Teams
Signatures that are designed to withstand scrutiny. Court-ready declarations, FRE-aligned evidence, dual timestamps, and 5 independent verification anchors on every document.
Challenges legal teams face with e-signatures
⚠ Court admissibility concerns
Basic e-signature audit logs often lack the evidentiary foundation needed under FRE 803(6), 901(b)(9), and 902(11). When challenged, weak evidence creates litigation risk.
⚠ Chain of custody gaps
Without immutable, hash-chained records, proving that a document was not altered after signing depends on the platform vendor's word — not cryptographic proof.
⚠ Non-repudiation weakness
Signers who claim they did not sign, did not understand, or were not the person at the keyboard. Proving otherwise requires more than an email address and IP log.
How Abundera Sign strengthens legal evidence
✓ Court-ready declarations
13-section Declaration of Custodian of Records citing FRE 803(6), 901(b)(9), 902(11), and 902(14). Digitally signed with PAdES-LTA. Includes a 26-term technical glossary. Sworn under 28 U.S.C. 1746.
✓ Hash-chained audit trail
Every event in the signing process is recorded with SHA-256 hash chains. Each entry includes the previous hash — any modification or deletion breaks the chain and is immediately detectable.
✓ Dual RFC 3161 timestamps
Two independent Timestamp Authorities (SSL.com + DigiCert) each cryptographically attest to the time and content of sealing. Third-party proof that cannot be backdated by any single party.
✓ 5 verification anchors
PAdES-LTA signature, dual RFC 3161 timestamps, Bitcoin blockchain anchoring, GitHub evidence anchoring, SHA-256 + SHA-512 dual hash, WORM storage, and public verification — independent layers of proof.
✓ Signing ceremony proof
Behavioral evidence of informed agreement: page views, reading duration, scroll depth, field interactions, tab visibility, and consent acknowledgment. Signer evidence scoring quantifies ceremony strength.
✓ Identity layering
SMS OTP, government ID verification (Veriff), KBA, identity photo capture, audio and video statements, browser GPS, passkey biometrics — layer evidence to match the risk level of each agreement.
Ready-to-use legal templates
See the evidence standard for yourself
Send yourself a document, sign it, and inspect the cryptographic proof page, hash chain, and Certificate of Completion — no account needed.