Which of the following is not a requirement for a personal services contract to be valid?

A) it must be in writing

B) it must be supported by consideration

C) it must be made by parties with contractual capacity

D) it must involve the performance of something that is lawful

The correct option is A, it must be writing.

Explanation:

For a service to be valid it must be based on something lawful which is enforceable at law, otherwise the law court would declare as null and void, hence in that case performance of the other party cannot be enforced.

Consideration is also an important ingredient, which implies that something worthy or valuable must exchange hands between the parties to the contract as a compensation for performance of duties.

The parties must also be seen by law capable individuals nor minors who have no capability to enter into a valid contract.

All in all, option A is the odd one sticking out.