SAP Business One Customer Overpayment Allocation

[samperera]

Dear SAP Business One Experts,

I have a situation where I am getting some excess payments from our customers. I need to transfer it to a Specific GL account in the same receipt (Incoming payment)

Eg: Outstanding Invoice is 100 USD, Customer pays 102 USD. I need to transfer excess payment of 2 USD to a GL account in the same incoming payment and  GL entries should be generated as follows

Bank Dr 103, Customer Cr 100 and assigned GL account Cr 3

Thanks in Advance

Sam