You may want to prevent circulation notices being sent to borrowers with a particular trap, for example, to borrowers with the "address in doubt" trap. To specify whether to send circulation notices to borrowers with a particular trap:

1. From the Module Menu select Maintenance, Circulation and then Borrower Traps.
2. Select the trap you want from the list.
3. Set Block circulation notices to Yes or No.
4. Click Save or Save & Close.

Null means the same as No.