You can review incoming payment before it is completed and decide whether you want to approve or reject it.

Review Decission	Description
`APPROVE`	The payment has been created and after approval will go to COMPLETED status
`REJECT`	The payment has been created and after rejection will go to REJECTED status. No return will be made automatically.
`REJECT_AND_RETURN`	The payment has been created and after rejection will go to REJECTED status. Automatically a return will be made to the original Payer. The payment will be refunded and its status will be updated to 'RETURNED'.