To set up automatic payments, first, customers must choose a payment method; i.e. a bank account, credit card, or debit card. Then, they must enter their payment information—depending on the payment method, this can include the account number for a checking account, routing number, the name of the account holder, credit card number, etc. The customer must also give the company explicit permission, or authorization, in advance to withdraw the money from their account at certain intervals. An automatic bill payment can be set up to charge the same amount at each interval (for example, digital streaming services), or for different amounts within a certain time period (for example, a utility bill that changes in pricing month-to-month depending on usage).