CCV Number
In order to better protect your security, ProposalSpace requires that you enter the CCV (credit card verification) number printed on your credit card.
What is it?
The CCV number is one of many fraud protection and prevention tools we employ to help protect you. It validates that you have the card in your possession and that the card account is legitimate.
Where is it?
For Visa, MasterCard and Discover Cards, the CCV number is the three-digit number printed on the back of the card.
For most American Express cards, the CCV number is the four-digit number printed on the front of the card.
Additional Information
You can find additional information about the CCV number at Wikipedia.