The assets bill book contains all the due dates for the invoices issued.

Additional maturities (such as ones generated by other programs) have to be entered by clicking on "Insert maturity" and by entering the customer name, the amount owed, the due date and a description.

A double click on a maturity will remove it from the bill book after selecting the type of payment received (method of payment).

After clicking on "OK" the maturity will be transferred to the journal.