How to pay a proforma invoice: all payment methods 500 Proforma invoice, invoice and receipt: the difference and where to find your documents 227 Paying with an RF code (DIAS) from any Greek bank 2366 Paying by bank transfer 191 What credits (account balance) are and how to use them 4129 Service renewal, reminders and what happens if payment is late 556 Changing billing cycle, upgrading and downgrading your package 210 How to request a service cancellation 327 Quotes: how to view, accept or reject a quote 173