Whoa, never noticed this new diplo request!

Halps said:

You can only ask to stop spreading religion AFTER they have spread it. You can't pre-empt them when you see their missionary or prophet entering your territory.

Click to expand...

That's true for the AI too, though.

I haven't always been denounced if I refuse, but most of the time I do get denounced if I refuse.

In my last game Byz was a really good friend of mine. She asked me to denounce another friend, so I refused. She did not denounce me (yay!) and no red modifiers appeared.

Interesting...I've never seen this before and so didn't know it existed until just now!