What is one requirement that must be fulfilled for a contract to be valid?

For a contract to be valid, mutual consent is essential. This means that all parties involved must agree to the terms of the contract and understand what they are agreeing to. This consent typically involves an offer by one party and acceptance by another, creating a meeting of the minds. Without mutual consent, a contract lacks the fundamental element of agreement and cannot be enforced.

While written documentation, presence of witnesses, and payment of fees may be important in certain situations or jurisdictions, they are not universally required for the validity of a contract. There are many instances where oral contracts can be binding if mutual consent is clearly established, demonstrating that mutual consent is the foundational requirement.