Subjects are checked for typographical errors, correct use and cross references that need to be added to the database. When an invalid heading is used, the bibliographic record needs to be corrected to the proper form. Most of the invalid headings reported are subjects. Duplicate patron records are reported to Circulation for correction. OCLC numbers are reported to whichever departments are involved.
Blind references occur when material linked to an authority record is withdrawn from the collection.
If an authority record leads a patron to a blank wall, the record is deleted. The collection no longer contains material by that author or on that subject. When duplicate authority records occur, both records are checked for any local notes that might have been added. Upon verification of a duplication, one of the records is deleted. The Serials Unit is responsible for all materials classed as serials.