Maximus wrote:
What point is there in sending a card to a station test you didn't hear?

What's wrong with being polite and just saying "Thanks for running the
test, but I couldn't get your signal at XXX"? Who knows, your response
might point out a previously unknown problem to the CE! I try to always
mention it in DX test announcements because I think a "thank you"
reflects well on the DXing community.

Lynn.