The requirement here is to have a repository within the customer master where we can store a list of Customer Reference Numbers (CRN) which is essentially a list of virtual bank account numbers that are assigned to each customer. These bank account numbers are virtual and link back to our main bank account.

For customers, the CRN is essentially there bank account number that they use to make payments and based on the bank integration setup rules, the payments are automatically receipted / allocated against the customer account / invoices as the system traces back the CRN to the customer account number.

This repository is similar to the ABN list and it should show which CRN numbers are already assigned and which ones are available. Same CRN can be assigned to multiple customer accounts if there is a parent / child relationship and payments are managed centrally.

At this stage, we don’t want the system to generate CRN numbers based on algorithms and logics as the list is provided to us directly by the bank. We are only after a repository listing showing whats available and whats assigned.