You can sign the letter yourself before transmitting it. This offers a simple process that also allows for negotiation. What is a letter of agreement? This type of contract documents a legal agreement between two parties. It shall set out in writing the terms of the agreement in order to settle any subsequent disputes that may arise. Oral contracts are sometimes enforceable, but the establishment of a letter of consent reinforces the legality of the contract in question. A valid letter of consent is the same as a valid contract….