It depends on you. In the short overview below we present each and every option.
Direct debit/credit card:
With your permission the chosen rate is debited from your bank account or your credit card will be charged.
Direct ebanking: The chosen rate will be transferred by yourself via online banking. All you need is your account number, bank code, PIN and transaction number.
Telepay: The charge is settled via your telephone bill issued by your phone provider - of course this is entirely anonymous.