How do you validate south African bank account numbers?

To validate South African bank account numbers, you typically use the Luhn algorithm, which checks the validity of the number's structure. South African bank account numbers generally consist of 10 to 12 digits, depending on the bank. Additionally, you can verify the account against the specific bank's format and ensure it corresponds to a valid bank branch code. It's also advisable to cross-reference with the official database or API provided by the South African Reserve Bank for real-time validation.