When a NACO cataloger finds an error on a NAR in the LC/NAF should the error be reported to the library that created it for correction?
No. In the interest of timeliness and the spirit of cooperation it is expected that if a cataloger finds an error in an authority record s/he is responsible for fixing the error(s) and reporting BFM. If the error is complex and may require extensive research, etc., in order to resolve, the NACO liaison may contact the liaison at the library listed in the 040 $c or $d of the NAR. Note that a listing of NACO liaisons by institution is available on the NACO website.