Pan-specific anti-humanized antibody antibody (anti-hzAbAb) are described as well as methods for generating and using pan-specific anti-humanized antibody antibodies (anti-hzAbAb) that selectively bind related antibodies such as those therapeutic humanized having variable domain framework regions sharing at least 80% sequence identity and/or those having variable domain framework regions sharing at least 80% sequence identity with a variable domain consensus sequence.
