Simple signing
No complex workflows. Upload, sign, and download in minutes.
OptiSign
Sign PDF documents electronically, with evidence behind every signature.
Designed to support ordinary electronic signatures under South Africa's ECTA (s13(2)–(3)), with consent capture, signer evidence, and a tamper-evident platform seal. OptiSign is not an advanced electronic signature service — use it only for documents legally capable of ordinary electronic signature.
Signing that holds up to scrutiny.
Secure & tamper-evident
Completed documents are sealed with a PDF cryptographic seal, so any change after signing is detectable.
PDF native
Works directly with PDF documents. No format conversion or special software needed.
Ordinary electronic signatures
Supports ordinary electronic signatures under ECTA s13(2)–(3), with supporting evidence under s15 — not an advanced electronic signature.
Fast & efficient
Sign documents in seconds instead of printing, signing by hand, and scanning.
Flexible rollout
Start with the ordinary electronic signature workflows that fit your documents, then expand as your team's signing needs grow.
What OptiSign is — and isn't.
OptiSign supports ordinary electronic signatures under the Electronic Communications and Transactions Act, 2002 (ECTA) s13(2)–(3). Every signature mark is backed by an evidence trail — the signer details supplied for the transaction, when the link was used, network metadata, and the consent they gave — that supports the signature under ECTA s15, and the completed document is protected by a platform digital seal.
Documents that cannot be signed electronically at all
Under ECTA these are excluded from electronic signing entirely: wills, agreements for the sale of immovable property, leases of land longer than 20 years, bills of exchange.
Documents that need an advanced electronic signature
Some documents require an advanced electronic signature that OptiSign does not provide: suretyships and documents signed before a commissioner of oaths.
When in doubt, ask a lawyer
OptiTrust does not provide legal advice. If you are unsure whether a document may be signed electronically, consult a legal practitioner before sending it.
How it works
Upload, sign, and download a sealed PDF — in three steps.
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01
Upload
Upload the PDF document you need to sign to the OptiSign platform.
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02
Sign
Apply your signature to the document securely within the platform.
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03
Download
Download your signed PDF, protected by a cryptographic seal you can verify at any time.