To integrate iDIN and IBAN Verification in your online platform, start by using iDIN to authenticate users, ensuring their identity is verified. Once authentication is complete, move on to IBAN Verification to confirm users have access to the specified bank account by executing a €0.01 transaction. This process confirms their ownership of the provided IBAN. By combining these services, you streamline user identification and payment verification. For detailed guidance and API references, visit the Developer Portal.