Answer:
voidable contract
Explanation:
A voidable contract is a contract that is considered valid until it is voided by one of the parties involved. The main difference with a void contract, is that a void contract is never a valid contract.
For example, I purchase a PS4 from my nephew who is a minor and I sell it to my neighbor, and my neighbor purchased it on good faith. My nephew can decide to void the contract because he was a minor, but since I passed good title to my neighbor while the contract was valid, my neighbor doesn't have to return the PS4.
On the other hand, if I had stolen the PS4, I would never have good title over it, and I sell it to my neighbor. The rightful owner of the PS4 can claim it back and my neighbor must return it because the contract was void since I never had good title on the PS4.
A voidable contact can be voided for a number of reasons, but unless sit is voided it remains as a good contract, and all transaction carried out while the contract is good are considered valid and good transactions.