Items that are currently missing need to be searched for on your shelves for three months.
Identify items currently missing by using the List Items Missing report in Analytics, found in "Shared Reports > For Libraries > Item Lists", and then searched for on your shelves. The report lists all items with a status of MISSING. It exports as an Excel file and can be sorted by Last Activity Date, to identify the items that have been missing longest.
When searching for items, check both where the item would normally would be shelved, and likely places where it could have been misshelved, such as shelves above and below their normal location, or under similar call numbers.
If the item is located on the shelf, discharge it. This will take the item out of MISSING and route it to the correct location, either back to its Home Location, or to a hold should someone be waiting for that item.
If you cannot find the item after three months, mark the item Withdrawn by checking it out to your WD-XX user, where XX indicates your library code. This allows the item to be fully removed from the catalog during item maintenance.
List Items MISSHOLD
This report that were on the Holds shelf for a patron, and now cannot be found; the item was very recently seen and handled to make the hold available for the patron. This can happen if the item is not checked out with the patron's other holds, or mistakenly given to a different patron.
Handle these items similarly to the regular List Items Missing report. Check for them on your shelf for three months, and if they are not located in that time, withdraw the item.