It’s getting tougher to exchange paper QSL cards for DX since the US Postal Service has temporarily suspended international mail acceptance for items addressed to certain destinations due to service impacts related to the COVID-19 pandemic. This situation could result in the return or loss of mail, such as QSL cards, addressed to affected parts of the world. The USPS has posted a list of affected countries, which is updated regularly.

And yet LoTW continues to work just fine and dandy…