One of the main reasons people buy and recommend Snap On is because of their warranty. You take away the warranty and you are left with an overpriced tool.
It's at the discretion of your driver. If the driver feels like doing you a solid he'll warranty your stuff. If you don't have a relationship with him, good luck trying to get anything from SO corporate. If you call them and tell them you're not the original purchaser, they will sell you repair parts at reasonable prices, but they won't warranty your stuff.
I have had a Williams ratchet that I told the CS rep up front that my friend had picked out of a scrap bin and both pawls were shattered; I was prepared to buy a repair kit if still available (it wasn't) but they offered to warranty it. They made me send it back to them, but I got a shiny new ratchet in the mail a short time later.
Huh? Hell no!
I bought Snap-On because their stuff doesn't break much at all. Warranty is a secondary concern, and I don't want to have to use it. If you need a good warranty, that means you expect stuff to break a lot. To heck with that.
You are not paying for the warranty when you buy their tools. You are paying for quality.
Thank you for your helpful responses. I guess I assumed the snap on warranty would be similar to craftsman or others - if a tool fails, they simply replace it. Does Snap On ask to see receipts? What if I was handed down tools from my father? No warranty if a wrench jaw breaks? I guess that's what I get for assuming, but it's not the end of the world and I'll happily have learned my lesson.