The Aritma Pay solution is dependent on the use of Bank Accounts in Business Central. The application supports scenarios where you have several accounts within several banks. You can also have bank accounts in several currencies.
Each of the bank accounts that is onboarded with Aritma must be assigned an account id that is provided by Aritma.
For more information on the use of bank accounts in Business Central, see Set up bank accounts in the Microsoft Learn documentation.