How to verify international supplier payment details (2026)

An email lands in your accounts payable (AP) inbox. It's from a familiar supplier you've worked with for years. They're letting you know their bank details have changed and asking you to update their info on record before the next invoice clears. You have a payment due to them this week that needs to be sent within the next day or two to ensure it arrives on time. What do you do?

Once an international payment leaves your account, getting it back can be difficult. Verification is the only meaningful control you have before release — and the moment where you can actually catch mandate fraud and invoice fraud.

So how do you actually verify international supplier payment details before sending the payment?

The short answer is a five-step process that layers IBAN validation, document cross-checks, name-to-account matching, an independent callback, and dual approval. Each layer catches something the previous one cannot.

In this guide, we'll cover the triggers that call for you to verify bank details, the five-step workflow, red flags to watch for in a payment request email, and how to make it a repeatable fraud prevention process.

When should you verify a supplier's bank details?

Verification kicks in at specific moments where the risk of paying the wrong account spikes — and folding it into supplier risk management keeps it routine.

When to verify bank account details:

• First payment to a new supplier, with no history to cross-check
• A request to change existing payment details by email, call, or message
• An invoice with account details that differ from prior ones
• Urgent requests that skip the usual procurement channel
• Unexpected changes in currency, country, or beneficiary name

Each trigger is a pause point. Recognising them is an important step in fraud prevention — mandate fraud and invoice fraud rely on AP not pausing.

How to verify international supplier payment details: A five-step process

 The five steps below layer structural checks, human verification, tool-assisted validation, regulatory name-matching, and procedural control. Each one catches a failure mode the previous step cannot.

Step 1: Validate the new IBAN with a tool like iBanChecker

First, feed the IBAN into iBanChecker, iBanFirst's free bank account verification system, and the bank's identity comes back in seconds.

What iBanChecker returns:

• Structural validity — check digit, country-specific format and length confirming a valid international bank account number
• Bank routing — name, BIC/SWIFT, country, city, address, postal code, copy-paste ready
• Per-account SEPA scheme capability — SCT, SCT Instant, B2B, Card Clearing, SDD, each yes or no

It gives you accurate validation of structure and routing in seconds.

What it does not do is confirm the account actually belongs to the supplier.

That's what follow-ups like account name-matching or supplier confirmation handle — more on that shortly. Bank account validation and identity matching are different problems, and good payment systems treat them as separate solutions.

One more thing worth noting here: iBanChecker tells you whether the IBAN is SCT Inst-capable — in other words, whether a Verification of Payee (VoP) name-matching check will fire when the payment is initiated. Keep that in mind for Step 3.

Step 2: Cross-check the account details against your original records

With the IBAN's bank, country, and scheme capability now on the table, the next layer is comparing what's resolved against what's already on file.

What to cross-check against:

• The original signed contract or master service agreement
• Prior purchase orders and invoices from the same supplier
• Prior successful payment records — bank statements showing the account number, IBAN, and beneficiary name
• Supplier onboarding documentation

If the new details match across two or more sources, the structural gate is cleared. If they differ or correlate with recent failed payments, escalate to Step 4.

This is the zero-friction baseline every mid-market finance team can run before any automation kicks in. The cross-check also moves faster when prior payment records live in one place — rather than scattered across bank statements, correspondent fee lines, and email threads. That's the practical case for running these payments through a structured payment platform from the start.

Step 3: Check name-to-account matching with Verification of Payee

Where iBanChecker confirms the IBAN is valid, Verification of Payee confirms the name on the account matches the supplier. It's the name-matching check embedded in SEPA Instant Credit Transfer under the EU Instant Payments Regulation, mandatory for Eurozone PSPs offering SCT Inst from 9 October 2025.

The four VoP outcomes for bank account verification:

• Match — the name matches the account holder on file
• Close Match — minor variation (e.g. typo, abbreviation), and the payer decides whether to proceed
• No Match — names diverge, a strong signal to halt and re-verify
• Cannot Verify — missing data or technical error at the beneficiary's PSP, falling back to manual checks

VoP is powerful inside SEPA, but it also has clear edges.

The 9 October 2025 deadline applied to Eurozone PSPs. Non-Eurozone EU payment service providers — for example in Sweden and Denmark — may be subject to a different phase-in timeline under the same regulation, so confirm VoP coverage at the counterparty's PSP for non-Eurozone SEPA corridors.

The UK domestic analogue is Confirmation of Payee (CoP) via Faster Payments, which uses sort code + account number rather than IBAN.

Where VoP returns Cannot Verify, proof of bank account ownership (an official bank statement, bank letter, or account screenshot on letterhead) becomes the fallback evidence.

If you're working with iBanFirst, our compliance infrastructure also sits between you and the financial institutions moving payment details across SEPA, with VoP-covered payments running by default inside the SCT Inst scheme it operates in as a payment institution licensed by the NBB and passported across the EU.

Step 4: Verify the supplier's identity through an independent channel

With Steps 1 to 3 complete, the callback is the final human verification step — escalate here if any prior step flagged something, or use it as confirmation if they all came back clean.

Call the supplier on a number from an independent source: the original contract, the supplier's website, or a verified procurement contact. Never use the number on the invoice or in the email unless you can verify it matches past correspondence. Ask for a known contact like the account holder, finance lead, or authorised signatory and confirm the change came from them.

Why not just reply to the email?

Because business email compromise is the most common delivery vector for mandate fraud — the address may be spoofed or the inbox compromised. The callback is the only secure way to verify bank details.

Manual callbacks take time — but they're non-negotiable. Don't skip this step, even when the earlier checks all come back clean.

Step 5: Apply dual-approval before releasing funds

Steps 1–4 confirm the bank account details are right. Dual approval confirms no single person can release funds without a second pair of eyes — meaning two authorised signatories on every payment to a new supplier or any change of detail.

Why is this an important step even after verification?

Because it catches the residual failure modes — internal error, compromised credentials, and collusion — that no amount of external verification closes. 

What are the red flags to watch for on a payment request email?

A payment request email can carry the right logo, contact, and template, and still be mandate fraud or invoice fraud in B2B cross-border payment flows.

Here are just a few of the red flags that should trigger a Step 4 callback:

• Urgency language like "same-day," "overdue," "urgent"
• Mid-thread change of bank details framed as "our bank has changed"
• Email domain mismatches like character swap, TLD change, or an odd reply-to
• Routing to a different country or currency than prior payments
• A finance lead who isn't the usual contact

Any one of these should halt the payment.

Red flags give the AP team a moment of pause — enough time to verify before funds reach the wrong account or generate failed payments.

It's worth noting that you can enforce the pause more easily when you run payments through a structured cross-border payment workflow, rather than informal bank transfers.

With certain cross-border payment providers, you can build in multi-level approval steps and require users with a specific permission level to approve changes. This becomes much more difficult — essentially impossible — with ad-hoc bank transfers from a shared user account.

Bank account verification beyond SEPA: What can you do when VoP doesn't apply?

VoP applies inside SEPA, and CoP applies inside UK Faster Payments. Outside those payment systems, there's no comparable regulatory name-matching check from the financial institutions involved.

The verification stack for non-SEPA corridors looks like this:

• Manual callback — Step 4 remains the primary check
• Business registry check — Companies House for the UK, equivalent national registries elsewhere
• Documentation request — official bank statement or bank letter on supplier letterhead
• Micro deposits — a small test payment the supplier confirms receipt of, useful where the currency is unusual and other methods are slow
• IBAN validation via iBanChecker where an international bank account number is used

The non-SEPA layer is manual and slower, but still systematic. Beyond SEPA, the operational infrastructure changes — corridor reach, tracking, and the FX exposure that forward payment contracts lock down — but the logic of how to verify bank details stays the same.

How to build a repeatable bank account verification process

One-off verification works for a single payment. A repeatable process works across every supplier and every month.

A truly repeatable bank account verification system should include:

• A documented trigger list — the moments that require verification
• Checkpoint ownership — who runs each step, who signs off, who escalates
• Integration with the payment workflow — verification steps embedded in the ERP or payment platform rather than running in parallel on spreadsheets
• Audit trails — every step logged against the supplier record for compliance
• Post-payment confirmation — tracking the payment to settlement and confirming the correct account received funds

The process should essentially be boring to run and near-invisible in normal operation.

Integrations and automation can also help manual checks become secure, compliance-grade, automated solutions. Think cross-border payment platforms that integrate with your ERP, embed verification checkpoints inside the payment workflow, and let payment tracking close the loop on every release with shareable links the AP team and supplier can both see.

Why businesses like yours choose iBanFirst

In addition to the free iBanChecker tool that helps you with account detail cross-checking and VoP verification, the iBanFirst platform also makes it possible for you to:

• Pay suppliers abroad through a payment institution licensed by the NBB
• Validate IBANs automatically before any payment initiates
• Control who can do what with granular user-level controls
• Embed dual-approval and verification checkpoints in ERP-integrated workflows
• Track SWIFT payments to settlement in real time and give your beneficiaries the same real-time visibility

Request an account today to see how iBanFirst can fit alongside — and improve — your payment security workflows.