ANSWER:

This is not permissible and it won’t change his aqeedah! 

Speak to him directly about it. 

QUESTION: I found a small pouch in my father’s car that seems to contain soil or sand. He believes it offers protection for him or the car — essentially, it appears to be a taweez. Would it be permissible for me to discreetly empty the contents and replace them with regular soil, so that he doesn’t notice the change?