Export skill points?

Per example player A want to transfer sp to player B by extracting custom sp to a scroll, then he exchange scroll to player B, and player B uses the scroll and receives the sp amount that player A transfered.

Or any other simple way?

Good Idea! I guess it's just coded into the Filter.

one of the simple way doesn't require any filter just create an scroll that consume the amount of skill point from player A then it gives you another scroll in the inventory or storage doesn't matter give it to the Player B and then you're done ....