---
title: "Proving an agreement to a bank, landlord or investor · Attest"
description: "Show a bank, landlord, investor or new employer that an agreement is signed without handing it over: what each asks for, which proof to send, how they check it."
url: https://attest.datahubz.com/guides/prove-agreement-to-bank-landlord-investor
updated: 2026-10-12
---

[Attest](https://attest.datahubz.com/)/[Guides](https://attest.datahubz.com/guides)

# Proving an agreement to a bank, landlord or investor

Send a zero-knowledge proof instead of the contract: it shows that you, or you and the other party's signer, signed an agreement, the day it was completed and the email addresses it names, and nothing about its terms, its title or any amount. With Attest, a proof is made for you when the agreement completes, and the bank, landlord, investor or employer checks it themselves at attest.datahubz.com/verify, free and with no account, while zkVerify verifies it independently.

By DataHubz · Updated October 12, 2026 · 7 min read

## First, ask what they need to confirm

Requests for "proof of the agreement" come in two kinds. Some people need to confirm a fact: that a signed agreement exists, who it is with and since when. Others need to read what it says: the rent, the salary, the contract value, the scope. A proof answers the first kind completely and doesn't try to answer the second, so ask before you send anything.

One question usually settles it: "Do you need to read the agreement, or to confirm that it's signed and with whom?" If it's the second, you can keep the contract to yourself. Tell them you will send a link they can check themselves instead of a PDF, and why: the agreement is confidential.

## What each one usually asks, and what to send

| Who asks                                             | What they usually want to confirm                                       | The proof to send                                                                                                | When they will need the document                                   |
| ---------------------------------------------------- | ----------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------ |
| A bank or lender, for a business loan or credit line | That you have signed contracts with customers or suppliers              | That you and the customer's signer signed it: an address at the customer's domain shows who the contract is with | When they lend against the contract's value or payment terms       |
| A landlord or letting agent                          | That you have a signed job offer or client contract                     | That you and the employer's or client's signer signed it                                                         | When they need the salary or fee itself, which a proof never shows |
| An investor, in early conversations                  | That agreements with key customers, distributors or partners are signed | One proof per agreement, each naming the other party's signer                                                    | In due diligence, when they review the contracts themselves        |
| A new employer or client                             | That engagements on your CV or proposal were under signed contracts     | That you and the former client's signer signed it                                                                | When they ask about scope, deliverables or fees                    |

Every one of these proofs shows the same things: the email addresses it names, the day the agreement was completed, and that the proof is valid and where its record is anchored. None of them shows the document, its title, its terms or any other signer.

## Which proof to make

**Share proof** offers two statements about a completed agreement:

- **That you signed it.** The recipient sees your email address and the completion day. Use it when the other party must stay unnamed, for example a client whose name is itself confidential. Nothing on the proof's page points to them either: the record a proof is checked against is the root of a tree of up to 65,536 completed agreements, yours among them, and it is anchored from Attest's own wallet, never from a party's.
- **That you and another signer signed it.** The recipient also sees that signer's email address. This is usually the one a bank or investor wants, because the address, at a customer's domain for example, tells them who the agreement is with.

A proof names email addresses, not companies, so say in your message who the other address belongs to. It also shows the address you signed with: if the bank knows you by a different one, tell them which you used. And because naming a co-signer shows their address to your recipient, ask them first if they would mind.

## What the date means

The date on a proof is the day the agreement was completed, which is the day its last signer signed, as a calendar day in UTC. It is not a start date, a lease term, a notice period or any other date written inside the agreement. If a landlord asks when your job starts, the proof shows when the offer was signed; the start date is part of the terms, which the proof doesn't reveal.

## Send it in three steps

1. Sign in at attest.datahubz.com, open **Documents** (it reads Agreements on accounts that use every Attest tool) and find the agreement under **Completed**.
2. Choose **Share proof**. Shortly after the agreement completes, a proof made for you appears in the list, marked "Made for you when it completed": it states that you signed it. To name the other party's signer, choose **That you and another signer signed it**, pick the signer if there are several, and click **Create the proof**.
3. When the proof reads "verified on zkVerify" in the list, click **Copy link** and send it. Until then it reads "being verified on zkVerify", and your recipient would see that check still in progress.

You can also give them the proof's ID, the part of the link that starts with azk\_, to paste at attest.datahubz.com/verify. [How to share proof that you signed](https://attest.datahubz.com/how-to/share-proof-you-signed) shows every step.

## A message you can adapt

> Hello,
>
> You asked me to confirm my contract with Acme. The contract is confidential, so instead of the PDF, here is a proof you can check yourself: \[proof link\]
>
> It shows that [user@domain.com](mailto:user@domain.com) (me) and [buyer@example.com](mailto:buyer@example.com) (Acme's purchasing lead) signed an agreement completed on October 12, 2026. To check it, open attest.datahubz.com/verify and paste the proof ID, or open the link. It is free and needs no account. The proof doesn't show the terms; if your review needs them, tell me what you need to see.
>
> Mary Ruiz

## What they see, and how they check it

The recipient needs no account and pays nothing. When they open the link, or paste the proof ID at [attest.datahubz.com/verify](https://attest.datahubz.com/verify) (typing that address themselves is a good habit with any link that arrives by email), they see:

- A verdict, **Proven true**, and the statement in plain words, such as "[user@domain.com](mailto:user@domain.com) and [buyer@example.com](mailto:buyer@example.com) are both parties to a completed agreement, completed on October 12, 2026."
- Five checks under Evidence: the proof is mathematically valid (a Groth16 zero-knowledge proof), the named people match the proof, it was proven against a published record of agreements, that record is anchored on a public blockchain (with a link to the transaction), and it was independently verified on zkVerify, the network that verifies every Attest proof (with a link to that verification).
- A note that the agreement, its document and any other parties stay private.

For their own file, they can download the proof's evidence file from the same page and check it with Attest's open-source verifier on their own device, without Attest. They can check the proof again any number of times.

## When they need more than the proof

Some reviews do need more. Two options, from less to more revealing:

- **The certificate of completion PDF.** It shows details such as the agreement's title, the completion time in UTC, each signer's name and signing time and the blockchain anchor, with no document, entries or audit trail. Any party signed in to Attest can download it from the agreement's certificate (the **Certificate** link on the document's row), even when the certificate is private, and it carries its own verifier.
- **The signed copy.** When they must read the terms, send the sealed PDF every party holds. They can verify it for free with the verifier attached inside it, or by dropping it on attest.datahubz.com/verify.

## Get ready before anyone asks

- **Sign as a party.** Proofs are made by signers. If you send agreements for your business, check **Add me as a signer** when you send, so you can prove them later.
- **Sign with the address you want shown.** A proof shows the email address you signed with.
- **Choose who sees the certificate.** A certificate is public by default and shows, among other details, the title and each signer's name and signing time, never the document. If the agreement itself should stay quiet, choose **Private** when you send it; proofs work either way.

Proofs come with the document on every plan, Free included, and use none of your documents or records. Each party can make up to 10 per agreement, and each can be checked any number of times. Of the [21 e-signature services we compared](https://attest.datahubz.com/compare/which-e-signature-services-can-read-your-documents) in October 2026, Attest and 20 others, Attest was the only one offering zero-knowledge proofs.

## Questions people ask

Will a bank accept a proof instead of the contract?

It depends on what the bank is checking. A proof settles whether a signed agreement exists, between which email addresses and the day it was completed, and the bank can verify that itself. If its review depends on amounts or terms, it will ask for the document, and you can send the signed copy, which it can also verify for free.

Can the recipient see which company the other signer works for?

Only through their email address: a proof names addresses, not companies. An address at a company's domain usually makes it clear, and your message can say who the person is.

Does the proof show when my lease or job starts?

No. It shows the day the agreement was completed, when its last signer signed, as a calendar day in UTC. Start dates and other terms are inside the agreement, which the proof never reveals.

My company's director signed the agreement, not me. Who makes the proof?

Your director: proofs are made by signers, from their own dashboard, and each shows the signer's own email address. If you sent the agreement, you can also download its certificate of completion PDF, which names every signer without the document.

Does it cost anything?

No. Share proof is on every plan, Free included, and proofs use none of your documents or records. Checking a proof is free for anyone, with no account.

## Read next

- [How to prove you signed without sharing the contract](https://attest.datahubz.com/guides/prove-you-signed-without-sharing-contract)
Prove you signed an agreement, and the date it was completed, without handing over the contract: a zero-knowledge proof, verified on zkVerify.
- [How to share proof that you signed](https://attest.datahubz.com/how-to/share-proof-you-signed)
Create a zero-knowledge proof that you signed an agreement, copy its link and send it. The recipient checks it free and never sees the document. Step by step.
- [Zero-knowledge proofs for business documents, explained](https://attest.datahubz.com/guides/zero-knowledge-proofs-explained)
What a zero-knowledge proof is, how Groth16, public inputs and verification keys work, and how Attest proves who signed an agreement without revealing it.
- [Verify](https://attest.datahubz.com/verify)
Check a signed document, receipt, certificate or proof for free, with no account. Drop the file, or enter its ID or fingerprint: it is checked in your browser.

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Source: https://attest.datahubz.com/guides/prove-agreement-to-bank-landlord-investor