With all of the banking cosolidation that's gone in the past couple of years a lot of people now have checkbooks in Dynamics with names pointed to banks that no longer exist. So something like Wach-Payroll is no long with Wachovia. The account is probably still valid and being used but Wachovia is now Wells Fargo. So how how do fix that? It's simple with the now free Professional Service Tools Library.
Once the Library is installed, simple pick the old checkbook, give it a new name and click Convert.
The Validate and Import buttons allow you to validate and upload the old and new checkbook ID's if you have a large number of them to fix.