In a nutshell, Direct Debit is the simplest and most convenient way for you to pay regular and occasional bills.​​​ It means you don’t have to worry about missing those important payments. It authorizes the organization you want to pay to collect varying amounts from your account – but only if you’ve been given advance notice of the amounts. Once you have agreed those, the money is deducted automatically. In Spain it is the most popular way to pay the bills.