OBYC DIF key

Dear All,

Can you please explain me about DIF key in OBYC. In which cases this DIF key is working ?

I have a strange situtation in MIRO. Instead of vendor , the amount is credited to DIF key. I mean normally ın MIRO, vendor is credited. But in my case there is no vendor, DIF account is credited.

So what is the reason of this DIF key is credited ?

Best regards,

Anil ELDEM