Invoice Bank Details Changed: What to Do Before Paying
Changed invoice bank details should be treated as a pause-and-verify moment, even when the invoice looks familiar.
Quick answer: stop and verify using a trusted contact method before you pay, approve, reply or ignore warning signs.
Quick answer
Treat unexpected payment or bank-detail changes as a verification problem, not an email problem. Pause the transaction and confirm the request through a known contact method before approving or paying it.
Fast decision
What this means for a small business
Changed invoice bank details should be treated as a pause-and-verify moment, even when the invoice looks familiar.
Most business cyber problems become expensive when a normal-looking request is handled too quickly. A safer process gives staff permission to pause, check the source, and ask for help before money, access or sensitive information is exposed.
This guide uses fake examples only. It is designed to help you prepare a safer next step, not to collect private records or replace professional investigation.
Warning signs to check
- The invoice has new BSB or account details.
- The email says payment is urgent or overdue.
- The sender address, signature or tone has changed.
- The supplied phone number is inside the suspicious invoice or email.
What to do now
- Pause payment until the change is verified.
- Call the supplier using a known number you already trust, not the number in the email.
- Record who verified the change, when, and which trusted contact method was used.
- Use a second-person approval for large payments or new bank details.
What not to do
- Do not pay just because the invoice design looks familiar.
- Do not verify by replying to the same email thread.
- Do not use phone numbers or links supplied in the changed invoice email.
Related Business Cyber Safety links
How to verify supplier payment changes
Continue with the related Business Cyber Safety guide.
Two-person approval for supplier payments
Continue with the related Business Cyber Safety guide.
Scam Safety hub
Use this when the issue looks like a scam message, fake invoice or payment redirection attempt.
Essential Eight small business hub
Review broader basics like two-step login, backups, updates, admin access and safer devices.
Benefits and practical outcomes
Use these outcomes as a practical check on whether the advice is making the situation clearer and easier to manage.
Reduce avoidable exposure
Simple account, update, access and verification controls can reduce common preventable weaknesses.
Recover with less guesswork
Documented owners, backups and evidence make incident response and restoration easier to organise.
Give staff a repeatable check
Plain-English steps are easier to follow than relying on memory when an unusual request arrives.
Prioritise the next fix
A short checklist helps separate urgent controls from improvements that can be scheduled later.
Example: payment instruction changes
An accounts email asks staff to pay a familiar supplier into a new bank account. The team pauses the payment and verifies the change using the supplier contact details already held in its system.
Outcome: a high-risk instruction receives an independent check before money moves.
FAQ
Is this a formal cyber audit?
No. This is a practical self-check guide, not a formal audit, investigation, certification or guarantee.
Should I share passwords or login codes?
No. Do not share passwords, login codes, banking passwords, card numbers or private customer records through this guide.
What if money has already been sent?
Contact your bank immediately. Then collect the invoice, email details and verification notes for review.