Unless the contract says otherwise, you can sign it for yourself, have it witnessed and notarized.
Contracts drafted by laymen can be perfectly valid contracts and be enforced by Court. There is no bar to parties making their own draft to execute a contract. It is not necessary for a lawyer to draft it for it to be valid.
To be considered legally binding, a document must include the valid signatures of all parties entering into an agreement and outline all the duties and responsibilities each has to the other(s).
Top ten tips in drafting and negotiating an international contract The language of the contract. Clear contract prose. Common law versus civil law. Jurisdictional issues. Terms of art. Personnel. In negotiations, expect the unexpected. Negotiation logistics.
How to Properly Sign a Contract So It Will Be Enforceable Make Sure the Contract You're Signing Is the Contract You Agreed to Sign. Date the Contract. Make Sure Both Parties Sign the Contract. Make Sure Any Last Minute Changes to the Contract Are Initialed. The Parties Must Sign the Contract in Their Correct Capacity.
The basic elements required for the agreement to be a legally enforceable contract are: mutual assent, expressed by a valid offer and acceptance; adequate consideration; capacity; and legality. In some states, elements of consideration can be satisfied by a valid substitute.