+=item paydate
+
+CARD only, required
+
+=item bill_location
+
+CARD only, required, FS::cust_location object
+
+=item paystart_month
+
+CARD only, optional, will be preserved when replacing
+
+=item paystart_year
+
+CARD only, optional, will be preserved when replacing
+
+=item payissue
+
+CARD only, optional, will be preserved when replacing
+
+=item paycvv
+
+CARD only, only used if conf cvv-save is set appropriately
+
+=item paytype
+
+CHEK only
+
+=item paystate
+
+CHEK only
+
+=back