IBAN validation and IBAN generation

An IBAN is an International Bank Account Number. It standardizes bank account details for domestic and international payments and helps identify bank accounts reliably.

An IBAN consists of a country code, two check digits and a country-specific account identifier. In Germany, this identifier includes bank code and account number.

IBAN-Test checks structure, length and check digits. For selected countries, additional validation against bank directories is available.

The check validates the country code, length, permitted characters and IBAN checksum. Depending on the country, it also checks available bank directories and national account checksums.

This detects many input errors but does not confirm that an account exists, who owns it or whether a payment can be executed. Check the IBAN again

The IBAN generator creates an IBAN from country-specific bank details. For Germany, this means bank code and account number.

IBAN-Test calculates the check digits, formats the IBAN and, where possible, validates the underlying bank data. This means the result is not only formatted correctly, but also checked for plausibility.

For automated processes, IBAN generation is also available through the API.

Compare the complete IBAN with online banking or a recent bank statement. Look for missing characters, transposed digits and confusion between letters and numbers, such as O and 0. Do not guess replacement digits.

Ordinary spaces are removed automatically. If the IBAN remains invalid, ask the account holder or their bank to confirm the bank details. Check the IBAN again

If confirmed details still fail, tell support the country and exact error message, initially without a complete IBAN or API token. Contact support. For technical API problems: API error codes.

The format check validates the IBAN structure, length and checksum. Bank data validation additionally checks whether the bank identifier appears in the available directories.

The depth of validation varies by country: bank directories and national checksum rules are not equally available everywhere. A successful format check is therefore not the same as a full bank data check. Checks available by country

Yes, the API checks the BIC format and returns available bank details. A BIC has 8 or 11 characters. Compare it with the bank’s information and check for missing characters or transposed digits.

A valid format does not guarantee a bank directory match. Missing bank details therefore do not automatically make a BIC invalid. If in doubt, ask the bank to confirm it. API documentation

Each supported country format has a fixed length, determined by the country code at the start of the IBAN. For example, a German IBAN has 22 characters.

Copy the complete IBAN from the bank’s information and check whether characters were lost or added during copying. Leading zeros are part of the IBAN. Do not add or remove digits by guessing. Check the IBAN again

The two digits after the country code do not mathematically match the rest of the IBAN. A typo, transposed digits or an incomplete entry is often the cause.

Compare the entire IBAN with the bank’s information. Do not change just the check digits to obtain a valid result: that would not confirm the intended bank details. Check the IBAN again

The bank identifier was not found in the available bank directory or does not match the country format rules. First check the country code, bank identifier and leading zeros.

Older bank details after a merger or change may also require confirmation from the bank. Confirm the current details before changing anything. A missing match alone does not prove that the account does not exist. Check the IBAN again

The right length alone is not enough. Where national checksum procedures are available, these are checked too. The account number must match the rules and the supplied bank identifier.

Check the bank code and account number together against the bank’s information, including leading zeros. If confirmed details still fail, contact support. This is a plausibility check, not a lookup of the actual account. Contact support

The format and checksum may be valid even when additional data is unavailable for the country or bank. Individual fields, such as city or BIC, may also be missing from an available record.

Missing bank details alone do not make an IBAN invalid. Consider the actual validation result and ask the bank to confirm any details you need. Checks available by country

No. A positive result only confirms the format, checksum and, where available, bank data checks performed. It does not confirm that the account exists, is active or belongs to a particular person.

Account balance, a direct debit mandate and successful payment execution are not checked either. IBAN-Test does not match the account holder’s name (Verification of Payee). If needed, confirm bank details through a trusted contact channel. Check the IBAN again

Yes. Ordinary spaces, tabs and line breaks are removed; lowercase letters are converted to uppercase. The usual display in groups of four is therefore accepted.

Hyphens, dots and other extra characters are not part of an IBAN and are not treated as normal formatting. Copy only the IBAN itself, without the label “IBAN”. Keep leading zeros. Check the IBAN again