2026-05-31 · 1 min read
IBAN check before payout testing
Validate structure with MOD-97 in sandboxes—never treat format checks as ownership proof.
IBANfintechtesting
Key takeaways
- IBAN validation catches typos, not whether the account belongs to your user.
- Use synthetic test IBANs from your payment provider docs, not random production numbers.
Sandbox workflow
Paste test IBANs into IBAN Validator before wiring payout forms.
Pair with your PSP’s penny-test environment for end-to-end confirmation.
FAQ
Does validation guarantee a real account?
No—it only checks format and checksum rules.
Can I paste customer IBANs?
Avoid production PII in shared tools; use redacted fixtures in tickets.