IBAN Validation Using Visual Builder Express for DoR in Oracle Fusion

Hi everyone,

We're implementing a Document of Record (DoR) in Oracle Fusion for employees to submit changes to their bank account details. Instead of using the standard screens, our customer has requested that every change be routed through an approval process, with a mandatory attachment (bank mandate) included. To support this, we’ve designed a custom DoR and added a Descriptive Flexfield (DFF) to capture the IBAN number.

Now, we're looking into Visual Builder Express and exploring whether it's possible to implement a validation rule that ensures the entered IBAN follows the correct format before submission.

🔹 Has anyone worked on IBAN validation using VB Express?