Akademik

invalidator
noun
an official who can invalidate or nullify
-

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

• Syn: ↑voider, ↑nullifier
• Derivationally related forms: ↑nullify (for: ↑nullifier), ↑void (for: ↑voider), ↑invalidate
• Hypernyms: ↑official, ↑functionary

Useful english dictionary. 2012.