I would find the original official who told you where the spot would be. If he is sure, he should make sure that the administering official puts the throw-in at the correct spot. If he told you one spot and his partner changed it, he should have let you know.

I would not suggest asking an official is he is sure.

I would suggest memorizing this so you can immediately know where the throw-in should be based on where the foul/violation occurred:



Disclaimer: in those areas near the dividing line, the throw-in spot may vary. Ask the administering official.