Do I need a credit card or is a debit card enough to pay my application fee for grad school online?

I am an international student paying with a debit card from my own country. It worked just fine when I paid for the GRE with it, also online. Could there be any problems? Thanks!|||Depends on the school you are dealing with..|||Debit card is money. Credit is as good as money if the tranaction is authorized.|||credit card is unforseen money that u can use, but it will charge u interest for borowing money. debit card is u put money in the card first then only pay. debit card is much better than credit card. credit card charge u interests !!