You can use the following tags

key				            will insert
-----------------       	-------------------
<CUSTOMER_NAME>			    the customer name entered on the confirm page
<ORDER_NUMBER>			    the order number
<ORDER_REFERENCE>			the order reference number
<MBR_CARD_NUMBER>           the member card number for this membership
<MEMBERSHIP_NAME>           the description of the item purchased for this membership
<CLUB_NAME>                 the name of the club for this membership
<MEMBERSHIP_LEVEL>          the membership level applied to this membership
<MEMBERSHIP_EXPIRY_DATE>    the membership expiry date
<ORDER_TOTAL>               the total cost of the membership purchase