Patron groups include both library patrons and status patrons (pseudopatrons) used by staff.
Patron group is one of three factors that determine loan period - the other two are CLIO location and Item Type. CLIO patron records have only one active patron group assigned; other inactive patron groups may be present.
All groups also have corresponding group "XXX-blocked" for when borrowing privileges are suspended. Privileges can be suspended for fines in excess of $100, an overdue recall, or it may be manually set.
NB: Each patron is assigned a unique barcode number. In the past, the barcode number was the person's social security number. When the University tranistioned to randomized barcodes in 2009 inactive patrons simply had their barcodes deleted, not replaced with a new barcode.