I was so afraid of doing this too. I told them I was not comfortable faxing copies of my license and cc to them. I sent them the numbers for my debit card through a fax with a cover letter and asked for a receipt. My wedding is about 3 weeks away and I've already made my final payment. Keep in mind any and allI "extras" you add on, which are all your flowers and updating colors and things, they require you send a bankers check. I sent mine certified. Hope everything works out!