Authentication system of payments

we need a system that makes authenticating payments through a printer Bematech MP20. The simple system will be where it should have a field to enter the initials of the company, date (dd / mm / yyyy) value and a sequence of numbers. This information should be printed on the same line. The data should remain in the system for several equal payments, changing only the sequence of numbers at the end. Should also allow you to choose how many endorsements we can do the same in the same sequence without changing the final numbers. The system should print in condensed mode and allow the change to the normal mode when necessary and also to change your font size. Must run on Windows XP. We From Brazil.