Most Helpful Girl
I would say it’s rude if you do it right away. You’re giving the impression you automatically assume they are lying. But, you can ask for like a contact photo. And when they say they’re doing something such as hanging with ___ pet. Be like oh cute! Can i see? And if they don’t show their face. Be like awww i don’t get to see you? Be playful with it until they’ve shown symptoms of lying about who they are. Then sure go ahead.
But there’s also many ways to find out information about people online. Such as google image search, tineye, their phone number etc