I found out the hard way - if you sell casino chips and insure them ( Post office ) - and the package gets lost - if you tell the Post master that it contained casino chips - They can consider that money ( casino type ) and not pay off on the insurance - They do Not insure money - Catch 22 - its much easier and some times cheaper to just send them 1st class confirm del. ( Put a wad of paper in the bubble mailer to make it 3/4" thick or better ) or priority mail confirm del. - then just track it.