In order to retain accurate long-term fines income statistics it would be useful if there were an option to allow libraries to retain a borrower's data from the accountlines table when the borrower is deleted, something like the biblio/deletedbiblio data retention. Our library system has been using Koha for almost 10 years now, so I'm surprised our staff hasn't noticed this until now!
We have been trying to avoid this problem by basing reports on statistics/action_logs whenever possible. Maybe this could be helpful for now.
Hi Cindy, this was fixed in recent versions - the borrowernumber is set to null now when hte patron is deleted, but the lines are kept, still allowing for accurate reports. See: Bug 21065 - Data in account_offsets and accountlines is deleted with the patron leaving gaps in financial reports *** This bug has been marked as a duplicate of bug 21065 ***