{"id":34177,"date":"2025-04-15T15:07:47","date_gmt":"2025-04-15T13:07:47","guid":{"rendered":"https:\/\/endereco.de\/?p=34177"},"modified":"2025-05-14T11:42:47","modified_gmt":"2025-05-14T09:42:47","slug":"check-iban","status":"publish","type":"post","link":"https:\/\/www.endereco.de\/en\/allgemeine_news\/iban-pruefen\/","title":{"rendered":"IBAN check: How to validate bank data correctly"},"content":{"rendered":"

What is an IBAN check and why is it important?<\/strong><\/h2>\n\n\n\n

The IBAN check is an important step to ensure that bank details are correct and valid. An incorrect IBAN (International Bank Account Number) can lead to misdirected payments or even financial losses. A precise IBAN check allows errors to be identified and corrected at an early stage.<\/p>\n\n\n\n

Companies and banks use special IBAN check algorithms to verify the structure and check digit of an IBAN. These automated checks help to identify incorrect or manipulated bank details and thus contribute to the security of transactions. A reliable IBAN check is essential to prevent fraud and ensure smooth payment processes, especially in online commerce and international payments. Having an IBAN checked minimizes the risk of incorrect transfers and fraud. Banks and companies rely on IBAN verification to avoid incorrect transactions!<\/p>\n\n\n\n

Check IBAN: How does it work?<\/strong><\/h2>\n\n\n\n

An IBAN is checked by mathematically validating the check digit and comparing it with official bank data. IBAN check algorithms help to recognize and avoid incorrectly entered or invalid IBANs. endereco checks the IBAN in two stages.<\/p>\n\n\n\n

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  1. Intensive testing (only available for Germany):<\/strong>
    In this variant, the IBAN is broken down into bank sort code (BLZ) and account number. Both components are then checked individually for plausibility. This takes into account the fact that each bank has its own logic for generating account numbers. This makes it possible to determine whether a combination of sort code and account number can theoretically be valid.<\/li>\n\n\n\n
  2. Simple check (for Germany and some other countries):<\/strong>
    The simple IBAN check contains two check digits (e.g. DE12...) in the first few digits, which are calculated based on the sort code and account number. This check can be used to detect at an early stage whether there is a typing error, for example.<\/li>\n<\/ol>\n\n\n\n

    Details on the IBAN check:<\/strong>
    During the check, the IBAN is validated based on its structure (syntax) and the check digit. It is possible that the IBAN is converted into a standardized format. This results in a main status code:<\/p>\n\n\n\n