How to pay a proforma invoice: all payment methods 260 Proforma invoice, invoice and receipt: the difference and where to find your documents 3 Paying with an RF code (DIAS) from any Greek bank 2104 Paying by bank transfer 2 What credits (account balance) are and how to use them 3885 Service renewal, reminders and what happens if payment is late 330 Changing billing cycle, upgrading and downgrading your package 5 How to request a service cancellation 216 Quotes: how to view, accept or reject a quote 2