A model of one request. Your money, $38,000, sits by the open door of your account. An email from your supplier says the bank changed and gives a phone number; Proofline refuses that number because it arrived with the request. The money waits at the Proofline checkpoint while Proofline calls the number that was on file before the email and asks the supplier whether they sent the request. If they say no, the money goes back into your account, the door closes and the new bank account is never used. If they say yes, the checkpoint opens and your team decides what to do next; Proofline never moves money. Either way a proof page records every step and reads "Log chain intact".

Your account
New bank accountfrom the email
Prooflinechecks before money moves2:00 PM
$38,000
Number on file, ending 0142On file since Mar 12, 2024

Your money, a new bank account from an email, and Proofline between them.

  1. 1 of 5: The model
  2. 2 of 5: The email
  3. 3 of 5: The checkpoint
  4. 4 of 5: The call
  5. 5 of 5: The answer

The bank changed? We call before the money moves.

A supplier or employee emails new bank details. Proofline calls the number that was on file before that email, gets a clear yes or no, and keeps the proof. Your team decides whether to send. Proofline never moves money.

US numbers only. The demo calls your own phone once, with an AI voice, and says so first.

  1. An email says the bank changed.

    Your supplier writes: we changed banks, send the money here, call this number with questions. That number arrived with the request, so it proves nothing. Proofline refuses it.

  2. The money waits at the checkpoint.

    Nothing goes to a new bank account until a real person on your supplier's side has said so. Not in the email: on the phone.

  3. We call the number you already had.

    The one from the signed contract, on file since March 12, 2024, long before this email. An automated voice says it is Proofline and asks one question: "Did you ask to change your bank details? Please say yes or no."

  4. Your supplier answers. You keep the proof.

    Answer for the supplier and watch the money. Every step is written to a proof page, each line chained to the one before, so an edit would show.

    Your supplier's phone rings. You answer as the supplier.

    Nobody answers for you. Pick one, or the story answers no.

How it works

For bookkeepers, freight offices and payroll teams: anyone who gets an email saying "our bank changed". Three steps, one request, and the money waits until a real yes.

  1. Step 1: Forward the email

    A supplier or employee says their bank changed. Send the email to your Proofline address. It shows up in your tracker, flagged, and nothing moves.

  2. Step 2: We call a number you already had

    Never the number in the email. Only one that was on file before the email arrived, from the contract, the W-9 or the HR file. The call says it is automated and asks one question.

  3. Step 3: Keep the proof

    A clear yes or no, in the person's own words, on one page for your client or insurer. Every entry is chained to the one before it, so an edit shows.

In development: features are planned, prices are proposed. See a proof page

The proof page

This is the page your client or insurer sees. One request, every step, in order, and the answer in the supplier's own words. Here, the supplier said no and $38,000 stayed put.

Proof page Sample

Nov 4, 2026

Bank details change from your supplier

Denied

Denied: the supplier said they did not send this request.

  1. 1Request received from a forwarded email.
  2. 2Number in the email refused: it came from the request itself.
  3. 3Trusted number picked: the signed contract, on file since Mar 12, 2024.
  4. 4Call placed. The call opened by saying it is automated and transcribed.
  5. 5Denied: the supplier said they did not send this request.

Log chain intact

Each entry carries a fingerprint of the one before it. Change any line and this page names the row where the chain breaks.

What Proofline never does

  • Never calls a number from the email itself.
  • Never says yes for anyone. If nobody answers, nothing is released.
  • Never moves money. Your team makes that call.

Try it on one request.

Forward one email, take one call and read the proof page it leaves behind. The demo runs on your own phone; the sample firm opens a tracker with requests already in it.

Plans from $0. Nothing here takes money. See proposed pricing