The word relates also to the legal phrase “officit conatus si effectus sequatur”, applicable in Tort Law. There it describes the legal principle that one action is harmful, only if the result follows. In other words, in order to pursue compensation, the claimant should have sufficient proofs that he/she has occurred concrete material or mental damages or loses. In other words, you cannot claim compensation for damages if no negative results occurred to you. This is why the compensation should not be mixed with the sanction, which is something else – namely punishment for illegal behavior.
Synonyms of “effectus” are “eventus” and “impetro”.