implied consent

Definition from Nolo’s Plain-English Law Dictionary

Consent when surrounding circumstances exist that would lead a reasonable person to believe that this consent had been given, although no direct, express, or explicit words of agreement had been uttered. For example, implied consent to a contract can be inferred when one person has been performing on the contract, and the other person has accepted the first person's performance without objecting or complaining.

Definition provided by Nolo’s Plain-English Law Dictionary.