Only certain very limited types of contracts can be canceled, within three business days after signing. No valid contract if incomplete agreement on amount of annual payment.A voidable contract has some defect allowing one or both parties to withdraw from agreement. In Georgia, contract rescission has been held to be the complete abrogation (abolishment or cancellation) of a contract. The offeror can revoke the offer at any time before it is accepted, provided the revocation is communicated to the offeree. Generally, an offeror can revoke an offer before the offeree accepts it. Withdrawal is also permitted if the lawyer's services were misused in the past even if that would materially prejudice the client. Valid contract must have: ➄ parties with legal capacity.