The new CHECKINSLIP notice does not work on patrons whose checkouts are anonymized upon checkin. Instead it appears that the patron had no checkins at all!

This is due to how the feature gets the old issues. The printslip script takes the borrowernumber and a branchcode and searches the old_issues table which is then filtered by date.

I think for this to function for anonymized checkouts we need to pass the actual issue_id's as a list to the slip so they can be looked up directly and not inferred by borrowernumber, branchcode and date.