Create accounts receivable / payable and how to make payments through the Debt menu. this function will make your work easier to find all your unpaid invoices and also update the payment for each unpaid invoices.
I. Create Credit Transaction Through Sell/Buy Menu
Step 1. Create a transaction using 'Later Take Credit' payment
*Note: You need to fill the contact information to create credit transaction
II. Search The Receivable List Through Debt Menu
Step 1. Select the 'Account Receivable' and click on the credit value
Step 2. Select the unpaid invoice number you want to add the payment
*Note: you can choose to 'Account Payable' for credit purchasing in Step 2