Ncblades recently posted on the "for sale forum" regarding that he needed a "proof of purchase" receipt for a knife that he insured that had been lost. I called USPS (1-800 askusps) and they verified this was true. Besides the proof of purchase receipt, they will accept an "appraisal source" , catalog support, and possibly a statement from the original seller (this was not real clear). I don't know about the rest of you guys, but I seldom have this documentation and getting it would be difficult. I guess the "bottom line" is that we may be wasting our $ when we insure most of the personal knives we ship. What's your thoughts about this?