A valid contract for the sale of real estate MUST include:

While an acknowledgment may be beneficial in certain contexts, it is not a mandatory component of a valid real estate contract. An acknowledgment typically verifies that a party has signed a document but does not establish the agreement itself, which is primarily reliant on the offer and acceptance.

A seller's deed is not required to form a valid contract for the sale of real estate. The deed is a legal document that transfers ownership after a contract has been executed; thus, while it is important for the transfer, it does not constitute a requirement for the initial contract itself.

The signature of a witness is not a necessary element for a contract to be valid in real estate transactions. Many contracts can be validly executed without witnessing, depending on the jurisdiction and the specific requirements of the contract type. This aspect is more relevant to certain legal documents rather than being universally applicable to all real estate contracts.