Normalization
Remove permitted spacing, standardize casing and return only a masked IBAN.
IBAN Check API
Normalize an IBAN and verify its country structure, length, and checksum locally.
The promise
Deterministic input validation, with no false claim that an account exists.
Responses include a check timestamp and explicit boundaries, so your application can distinguish a negative result from an unavailable source or missing identity.
POST /v1/iban/check
{ "iban": "DE89 3704 0044 0532 0130 00" }
{
"valid": true,
"normalized_masked": "DE89**************3000",
"checks": { "checksum_valid": true },
"account_status": "not_checked"
}What it checks
Useful signals with explicit boundaries.
Validate IBAN format, country structure, expected length and MOD-97 checksum locally without claiming that a bank account exists.
Country structure
Check the country code and expected country-specific IBAN length.
MOD-97 checksum
Run the deterministic checksum defined by the IBAN standard.
Where it fits
Built for real workflow events.
A valid format and checksum do not prove that the account exists, is open, belongs to a named person or can receive a payment.
Payment form validation
Call /v1/iban/check from this workflow and retain the returned evidence with the business event.
Supplier onboarding
Call /v1/iban/check from this workflow and retain the returned evidence with the business event.
Payout file preflight checks
Call /v1/iban/check from this workflow and retain the returned evidence with the business event.
FAQ
IBAN Check questions.
Need the request schema or complete response fields? Continue to the API reference.
Does a valid IBAN mean the bank account exists?
No. It means the identifier has a valid country structure, length and checksum. Account status is not checked.
Do you store the full IBAN?
The normal response and ordinary application logs use a masked value. Sensitive raw inputs should not be written to general logs.
Is an external provider required?
The initial structure and checksum checks are deterministic and run locally without an upstream validation fee.