no original reciept required for warranty, just send it in and they fix it however mine went in for bent screwdriver tips and had no problem on my original. The wave is in for a broken needle nose piler tip (not a good pry bar either) I'll find out in a couple weeks if there is any cost or not but I dont' imagine so. As far as warrany issues. They have gone from a lifetime on the originals down to 25 year warranty but unless you have a model that has been out for greater than 25 years they don't have a foot to stand on in denying your warranty claim. Though it does say that they don't warranty abuse and using the blade as a prybar might qualify.
All you have to loose by shipping it to them is the knife you aren't going to use anyway.
Address for repairs