Absolutely. Your "Rounding Cards" can be credit and or debits cards.
Your Rounding Cards are the cards that you wish to have your change rounded up from. For example, if you make a purchase using one of your Rounding Cards for $5.64, then $0.36 will be added to your total donation amount for the month.
In order to verify your Rounding Cards, you will need to login to your Bank/Financial Institution. Your banking information is tokenized and protected via Plaid's partnership with your bank. PWI never sees or stores this information.