A California Assignment and Assumption Agreement (also known as an "A&A Agreement") is an agreement used to transfer a party's rights and obligations in a contract from one party to another. California A&A Agreements are commonly used in real estate transactions, such as the sale of a business, transfer of a lease, or assignment of a loan. They are also used in other situations where the rights and obligations of an existing contract need to be transferred from one party to another. There are two main types of California Assignment and Assumption Agreement: a written agreement and an oral agreement. A written agreement is most commonly used in real estate transactions and must be signed by both parties in order to be legally binding. An oral agreement, on the other hand, is an informal agreement between two parties and is typically used in less formal transactions. In either case, the agreement must include details about the assignment and assumption of the rights and obligations of the contract, the date of the agreement, the parties involved, and any other pertinent information. The agreement should also be signed by both parties and witnessed in order to be valid.