=item * card_number
-Credit card number (obviously not required for non-credit card
-transactions).
+Credit card number.
=item * cvv2
=item * expiration
-Credit card expiration (obviously not required for non-credit card
-transactions).
+Credit card expiration.
+
+=item * track1
+
+Track 1 on the magnetic stripe (Card present only)
+
+=item * track2
+
+Track 2 on the magnetic stripe (Card present only)
=item * recurring billing
=item * start
The date of the first transaction (used for processors which allow delayed
-start).
+start) expressed as YYYY-MM-DD.
=item * periods