Hello @Jinshu1987
Currently, you have to refund that backers manually, please find below for which reward backers have selected to see by a campaign owner
![getfund crowdfunding script](https://image.prntscr.com/image/n5kr0Yh6RQekF5ZMmqNTJA.png)
Open a payment view, then go to the bottom of the page, if there is no reward selected, then backer backed an amount and doesn’t select any reward.
Best regards