CloudResearch allows requesters to reverse worker rejections within the first 30 days of the workers' submission.
If you accidentally reject a workers' submission or decide you want to reverse a rejection after corresponding with a worker, you can easily do so within CloudResearch. After you issue a rejection within a study, a Reverse Rejections button will appear under Options on your study dashboard.
Once you click on the Reverse Rejections button, you will be taken to a page where you can manage rejections. Simply click to reverse the rejection and approve the worker. You can add a message if you wish. Once you click Save Changes the rejection will be reversed and the worker will be automatically paid.
Note: In order to reverse a rejection, you must have enough money in your MTurk balance to cover the participant payment and MTurk fees.