Is there a way to permanently stop someone from charging Google play to your mobile account

[AC Question]

My nephew keeps charging music and apps to my mobile account through Google play. How do I disable the ability to do so?

 

[belodion]

Change your password.

 

[anon(10101748)]

Is he to fast to catch? Cause if you can get a hold of him I can think of a fee ways, lol

 

[TenshiNo]

Here's a CNET article detailing how to require a password for all purchases:

https://www.cnet.com/how-to/adjust-google-play-to-require-a-password-for-every-purchase/

Although, I found PhoneDr's answer pretty funny, too