So, if I understand this right, when you send in submissions to any grading company, because you are not actually selling or buying from them, if you don't have a previous purchase record, you are essentially out of luck if the package gets lost?
What about stuff that has been in your collection a long time, stuff from big group lots or collection purchases. Stuff you might have originally bought 20 years ago and didn't think there was a reason to keep the receipt on record?
Could you submit your submission form with estimated values?