verifier

Verificador means “verifier”: a person, system, or tool that checks whether something is correct, valid, or true. It is a masculine noun; use verificadora for a feminine person or, in some contexts, a feminine device or application.

It comes from the verb verificar, “to verify.” Common collocations include verificador de datos (“fact-checker”), verificador de identidad (“identity verifier”), and código verificador (“verification code”).

1. El verificador confirmó que los documentos eran auténticos.
   The verifier confirmed that the documents were authentic.