For payment, WordPress accepts all major credit and debit cards, and you can also pay directly through your PayPal account. In some countries, WordPress supports additional local payment methods, as listed below.
WordPress cannot accept cheques, cash, purchase or money orders, or any payment that must be mailed, and cannot accept payment over the phone.
Adding A Credit Card
You can link a credit card to your account by going to Purchases → Billing in your profile settings. Once you’re there, scroll down to the Manage Your Credit Cards section and click the Add Credit Card button.
This page allows you to add a credit card without any site assigned in your account or any active purchase.
Read more here: www.en.support.wordpress.com/payment