Digital signature with evidence
Signature workflows for agreements, annexes and records with cryptographic evidence and signed document immutability.
Overview
Sign without chasing people: guided signing flows, clear evidence of who/when, and sealed documents that can’t be altered afterwards.
Problems we solve
Paper and scans
Print, sign, scan, resend… repeat for every change.
Near-duplicate PDFs
Multiple versions circulating without control.
No evidence
Hard to prove who signed what and when.
Post-sign edits
Documents can be modified after signing without detection.
Key capabilities
Signature workflows
Sequential or parallel signing circuits for multiple signatories.
Cryptographic evidence
SHA-256 hash, timestamp and metadata for each signature.
Immutability
Signed documents are sealed and cannot be modified.
Certified timestamps
Timestamps with evidentiary value.
Audit trail
Complete log of who signed, when and from where.
How it works
Send for signing
The school initiates the signing flow and selects the authorized signatories.
CentroSign with evidence
Each signatory reviews the document and signs digitally with cryptographic hash and timestamp.
EmpresaSealed document
The signed document becomes immutable with verifiable evidence and complete audit trail.
AdminEvidence & compliance
SHA-256 hash of each signed document
Certified timestamps with evidentiary value
IP, device and time record for each signature
Post-signature immutability verification
Digital chain of custody for the document
Before and after
Paper signatures with scanning, duplicate versions and no evidence of who signed or when.
Digital signature with cryptographic evidence, immutability and complete audit trail.
Related modules
Who’s involved
Legal signatories
Sign agreements and annexes with traceability.
School coordination / Admin
Manages the signing flow and versions.
Tutors
Sign operational documents when applicable.
Want to see this module in action?
We’ll show you how it works with your real workflow and regional annexes.