E-payment systems allow for payments of goods and services over the internet. They typically involve a buyer, seller, payment gateway, and both a buyer's and seller's bank. Common e-payment methods include prepaid cards, internet/mobile wallets, and remittance cards. Prepaid cards can operate on open or closed loops, with open-loop cards accepted globally and closed-loop cards limited locally. Debit cards withdraw funds directly from a linked bank account, while credit cards provide a line of credit to make purchases. Micropayments enable very small financial transactions by mobile phone instead of cash or cards.