It is very important to remember that if you need a QSL sent through Bureau please always use OQRS https://m0urx.com/oqrs/
If you send a QSL via Bureau you MUST write “QSL Via M0URX” and highlighted, in larger text than the DX station P3J for example.
Writing the QSL Via on the QSL card, does NOT always mean that the QSL will be routed as you intended.
A good reason to use OQRS instead.
Remember for most DXpeditions or contest stations and many DX, your QSL will NOT be needed. It is very important to save Bureau costs and use OQRS ONLY.