confirming Synonyms

substantiating validating confirmatory verifying establishing certifying checking collateral ratifying corroborating confirmative supporting positive corroborative corroboratory endorsing substantiative validatory affirming proving acknowledging attesting verificatory authenticating demonstrating validate support revalidating making sure verifying again substantiate verify cross-checking ascertaining supportive confirms ensuring authentication reassuring reconfirming backing up securing sanctioning reassert auditing assuring assert asserting assenting approving