Nothing happens if you don't report it.

Using one's credit card with one's Paypal account is not a crime.

Are you saying someone used your Paypal account without your permission?   Or stole your credit card?

We have no clue what is going on here because you didn't bother to ask a coherent question or give any details. 

You only gave us half a question. Where's the details? Millions of credit cards are used on PayPal everyday.