This is an issue i have "flown into" in the US, so to speak.
While landing at TJIG (Luis Ribas Dominicci in Puerto Rico) i was asked to report position, so i reported abeam one of the VRP's on the terminal area chart. I immediatly got scolded by atc along the lines of "I don't know where that is, use an official reporting point" except the official reported points aren't actually shown on the TAC, not mentioned in the AF/D and there's no VAC either... then what?