In case, where a proposal and it as acceptance are not made by words and are inferred from the conduct of the parties. They are known as

Implied offers are those made through the conduct or actions of the parties rather than through spoken or written words. For example, when a person performs a service that is typically paid for, their conduct implies an offer to provide that service for a fee. This is recognized under Section 9 of the Indian Contract Act as an implied promise.