How can i print a list of bills that were not paid as of december 31, 2011?
How to print out only bills that have been paid during specific period?
How to print out only bills that have been paid during specific period?


Your title states "bills that were not paid" and your question is "print out only bills that have been paid"......so 1st question:
Reports > Vendors & Payables > A/P Aging Summary. Adjust your date to the end of December.
2nd question: Go to the Vendor Center and click on the Transactions Tab and highlight Bill Payments. Filter by = All and Date = All. Right click on any transaction and View As A Report. Adjust your dates accordingly.
Hope this is what you are needing !