double check

English Thesaurus

1. something that checks the correctness of a previous check (noun.cognition)

hypernym	:	assay, check,
definition	:	an appraisal of the state of affairs (noun.cognition)

derivation	:	double-check,
definition	:	check once more to be absolutely sure (verb.cognition)

derivation	:	double-check,
definition	:	check once more to be absolutely sure (verb.cognition)