I received a few eQSL's from shortwave listeners.
Should I send an eQSL back or just archive these QSLs? Also, is it possible to receive a paper QSL card from a SWL?
UPD: The reason why I asked this question is that eQSL.cc has certain rules regarding sending QSLs for QSOs that didn't happen. I'm not sure whether it will count as if I had a QSO with an SWL (which naturally couldn't happen) if I respond.