The 'easy' way to assign the contract is to have a one page document stating that for some consideration, the 'buyer' transfers/assigns the contract to a new 'buyer'. Executing (signing) the assignment and receiving 'consideration' (eg $2000 or whatever) would then extinguish your rights to the contract.
Both involve the meeting of minds and exchange of promises, but a contract typically entails a more formalized arrangement, often documented in writing, and carries legal enforceability. Conversely, an agreement can be informal and may not always be legally binding.
If you communicate clearly, then this is typically not an issue. This is because the seller has signed a legal and binding contract, which makes them obligated to fulfill the terms of the contract. You have every right to perform an assignment of contract when everything has been done legally.
How to draft a contract between two parties: A step-by-step checklist Know your parties. Agree on the terms. Set clear boundaries. Spell out the consequences. Specify how you will resolve disputes. Cover confidentiality. Check the legality of the contract. Open it up to negotiation.
How to write a letter of agreement Title the document. Add the title at the top of the document. List your personal information. Include the date. Add the recipient's personal information. Address the recipient. Write an introduction paragraph. Write your body. Conclude the letter.
An assignment and assumption agreement is used after a contract is signed, in order to transfer one of the contracting party's rights and obligations to a third party who was not originally a party to the contract.