Are you in the states? I understood that first class international has tracking. It's how 90% of the coins I buy from the US come. In 700 purchases & sales combined I only had 2 coins not arrive. Now 90% of these coins were sent letter mail. The 1 sale that was claimed not received I believe was a scam. As sometimes I put the incorrect postage on the envelope, the coin Is returned to me for more postage. So I know return address works. I also put packing taping all around the border to strengthen from machine tears. The first 3 months I started buying, I had 2 envelope arrive with tiny year in bottom corner and no coin. The coin never arrived, but the envelop sure did. Lucky for me they were cheap coins, so I never bothered the seller.