I have lost 4 that I can remember off the top of my head for certain, and possibly one or two more. Always shipped through Canada Post/USPS and not one of them insured, although in the one instance, when I showed the Canada Post representative the uninsured neatly slit envelope that was returned as "Found Opened without contents" by the USPS, Canada Post agreed to pay me $160 CDN (parcel value was $320 CDN) and accept 1/2 liability for the loss. The USPS was not as nice. The rest were write-offs, with the most recent being 5 slot cards going to Skip Harouff about 4 weeks ago.