French-English translations for certifier

certifyThe latter cannot issue authentic acts and are only authorised to certify signatures. Ceux-ci ne peuvent pas délivrer d'actes authentiques et sont uniquement habilités à certifier des signatures. These blankets have been certified as fireproof.
acknowledge
us
to acknowledge the being of a godto acknowledge a favorThis is to acknowledge your kind invitation to participate in the upcoming debate

attest
us
When will the appraiser attest the date of the painting?You must attest your will in order for it to be valid.Her fine work attested her ability.