Replying to Anyone have any experience with GoPro warranty repairs??

Alright so my GoPro is fucked, I contacted GoPro support, they agreed to give me a new one or try to fix it. It has been less than a year since I bought it. I'm having a lot of trouble finding my receipt in my emails/computer, do you think this is a big issue? Do they have all that on record somewhere? Basically I'm asking, if I send in my GoPro without the receipt, will they still be able to send me back a working one?