invalidator

Noun

Meaning

an official who can invalidate or nullify

Source: WordNet

nullifier voider deflector debaser eliminator gusset refuter rebutter disarmer defecator debaucher neutralist avoider confuter revoker

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approver maintainer authenticator acceptor verifier formalist

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official functionary

my bank check was voided and I wanted to know who the invalidator was Source: Internet

invalidated invalidating invalidation invalidcy invalide invalidhood