I need help with this! Want to find out if someone is trying to scam me!

Sounds fishy. They would require your account number.

Absolutely Not! This is not a good way of doing business, No matter what anyone says.
This way of putting money onto your card leaves the door wide open for scams!
Donot by any means give out your credit card details for people to put money onto. Give them a bank account or get them to send you a cheque.
Good luck