Example of credit card form, Expiration Date option {XX}-{month-name} {year} - ideas taken from http://baymard.com/blog/how-to-format-expiration-date-fields

Printer: print.up

As it appears on the credit card
PV
12-19 digits, spaces are allowed
1234334323343432
31-gen-2019
3-4 digit code, typically on the back of your card
123