04 / Maka ụlọ ọrụ

Ask for a signature.Keep the signed copy.

Send a document for signature and mark the places that need attention. The person reads it and confirms with their passkey. Both sides then keep the sealed signed copy and its verification record.

Offer letters · tenancy agreements · loan documents · mandates · board resolutions

N'ime ngwa

One signature, end to end

Offer letter · Adaeze Nwosu

Sealed

  • Delivered12 Jun, 09:14
  • Opened12 Jun, 18:02
  • Signed13 Jun, 08:41 · confirmed with a passkey on her own device
  • Sealedthe signed copy, checkable by anyone

  1. Place

    You put the fields where they belong

    Signature, initials, date, the blank the guarantor has to complete. You put them on the page itself rather than in a form beside it, so the signer is answering the document, and so a mark that appears on the contract was placed there by whoever drafted it.

  2. Bind

    You know it was them, not their inbox

    The signature is confirmed with a passkey on the signer's own device, tied back to the identity they proved with their NIN and their face. There is no shared link that works for whoever opens it.

  3. Prove

    You hand the signed copy to anybody who asks

    A court, a regulator, the other side's lawyer. They check the file in their own browser, without an account and without uploading the PDF. The result shows whether the exact signed bytes and embedded sender record pass Keepable's published verification rules.

A signature image can be copied. A document-bound signature can be checked.

What kind
An advanced electronic signature and signed provenance sealed into the PDF.
What binds it
A passkey on the signer's own device, signing this document's hash and no other.
Where it stands
Designed around Evidence Act sections 84 and 93, with a record checked locally in the verifier.

Nkọwa zuru ezu

What does the signer's passkey actually sign?
Not a login prompt. The challenge their device signs is built from the hash of this exact document, this agreement, and their position on it. That is the whole difference between proving somebody was in a session and proving somebody approved this page. Their device asks for a face, a fingerprint or a PIN before it will produce it, so what is recorded is a deliberate act rather than a phone being unlocked nearby.
How strong is the evidence, honestly?
Every signature records its own tier rather than leaving you to assume. The one that ships today is bound to the signer's own key: a third party holding the public key can confirm that authenticator approved that document, without trusting us at all. The fall-back tier, for a signer with no passkey, is platform-attested, where we are the witness. A signer who has a passkey cannot quietly land in the weaker tier.
How does the verifier know Keepable sealed it?
The PDF carries Keepable's document signature, its certificate chain and signed provenance naming the sender and recording when Keepable accepted the send action. The verifier checks the exact file against the private root and the document-signing certificates Keepable currently authorises.
Who holds the key that seals it?
The seal is applied by a key held in a hardware security module, and never exported into the memory of an application server. It is Keepable's sealing key. A signature already present in an uploaded file remains part of those bytes, but Keepable treats it as opaque content.
Can two people sign, or a witness?
Yes. Signers, witnesses, delegates who may act for a signer without ever signing, and viewers who only read. Each mark is the same ceremony underneath whether it renders as a signature, initials or a printed name. Every one of them is minuted with the person and the time.
What does the other side's lawyer actually do to check it?
Opens our verifier, chooses the file, and reads the answer. The file never leaves their machine: their own browser computes the hash and only that is sent. No account, no request to you, and no request to us for anything beyond the check itself.

Oke ya

An electronic signature is not a notarisation. It proves who signed, when, and that the wording has not moved since. Keepable can carry a witness through the same ceremony, but where Nigerian law needs a deed stamped or registered, that still happens the way it always did, and we would rather say so here than let you find out at the registry.

Malite ebe a

Meghee Keepable Workspace

Maka ndị mmepe: Correspondence reference.