Nope, they receive the untrusted ecash to their NIP-60 ecash wallet and swap it to a trusted mint or lightning wallet later, on their own time. This moves the error case from the sender to the recipient.
It's just a better system for zaps.
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Why should I as a recipient have to pay the fees for others’ zaps, because mints can set any fee they want
I also as a recipient don’t want to show “zaps” that could be paper Bitcoin with no backing, thanks
"Why do I have to pay a fee on free money people gave me?"
Do you ever listen to yourself?
Don't like ecash? Don't use it! No one can make you. Stick with lightning zaps.