Digital goods like Vouchers, gift cards, project design file are not allowed to be refunded after goods are sent.
As for PCBs, SMT and 3D Printing products, we produce it based on your designs you sent.
Please kindly check the boards once you receive it, if any issue, feel free to contact us. To avoid any unnecessary loss, you had better to do some test before assembling. Typically, we will only follow clients’ file to make the PCB boards and we are not responsible for finding all the issues in the Gerber file. If our engineers find some problems from the file, we may confirm with you and help to modify it.But if our engineers don’t find the problems and we may not inform you, so you had better to check the file carefully before you upload it.