Used stamps exchanges.

Ciao to all from Diego.J am members some months ago,j send 12 letters but receive only 2.Have an idea?

I am having the same problem. Have not received an envelope in a while although 4 of the 5 I sent were delivered.

6 letters (3 letters in 2020) collectors didn't received and I can see 4 still not reach destination yet.
8 letters (6 letters from January till November 2020) didn't reach my destination.

I lost 29 letters (2900 stamps) which did not get to me.

I lost EIGHT letters (800 stamps) which did not get to me. I don't know whether the senders did send them or my local Post stole them. But it happened a few years ago.

Some letters missing or it maybe delay because of coronavirus and countries on different level of restriction/lockdown