This is useful for clearing a book drop.
1) To change effective check-in date, select Circulation → Check In Items. In Effective Date field enter the date in yyyy-mm-dd format.
2) The new effective date is now displayed in the red bar above the Barcode field.
3) Move the cursor to the Barcode field. Scan the items. When finishing backdated check-in, change the Effective Date back to today’s date.