Logic brick: reverse copy property

I have noticed there is a ‘copy property’ to copy one property from one object to another, but is there a way to ‘send’

cause right now im suck with only sending a message from A to B, but I cant find a way to send a property from B to A like when B finishes a process

please help (and sorry if I confused you)

You could put the copy property on the receiving object, and link it to whatever sensor you want on the “sending” object. Or you could use Python…