I read a good article about sending credit card information and they recommended the following scenarios:
1. Fax the information over
2 2. Phone the information in
3 3. Email the info but split up the info in half in 2 separate emails….first 8 digits and 2 security codes and the month of the expiration date in one email and the other 8 digits, the rest of the code digits and the year of the expiration date.