When making a donation in BBIS, donors can enter a funder number to associate with their donation. However, there is nothing in place to prevent a donor from entering a finder number that is associated with another constituent. BBIS/CRM users can download the transaction to a batch and successfully validate the batch even though the finder number does not match the constituent (as assigned in the associated marketing effort).
Download and install the latest patch, which contains all fixes from previous patches. If you are running an older version, download and install the latest version and then the patch.