If I spend time, effort and money to send you free seeds and you never bother to let me know you received my send I will most likely never send seeds to you again.
I honestly don’t think this is asking to much of a person. Yes things happen, we forget or get busy.
I always upon receipt of seeds from someone whether free or not message that person and let them know that their letter made it to me.
Safety is always a concern, so if someone sends and you don’t receive there is obviously a breakdown somewhere in that chain. Be it on the senders side or receiver side. Knowing which is the case is pretty damn important.
So please be courteous folks and let the sender know that you are in receipt of someone’s time and efforts.