Illegality of a contract results on two consequences:

• the agreement is void;
• a party cannot recover what he has parted with (or paid), upon the illegal contract, (Weeramantry, page 332)

Contracts may become illegal:

• because they are in conflict with a statute, or
• because they are illegal at common law, or
• because they are opposed to public policy or morality, (Weeramantry, page 333).