The membership card header file includes the following fields.
 
BUSINESS PROCESSOUTPUT_PKID
ID
CONSTITUENT ID
GIFT FROM
GIVEN BY ID
EXPIRATION DATE
IS GIFT
MEMBER
GIVEN BY
JOIN DATE
LAST RENEWED ON
LEVEL
PROGRAM
SEND RENEWAL
STATUS
TERM
TYPE
CURRENT LEVEL PRICE
NEXT LEVEL NAME
ADD-ONS
NUMBER OF CHILDREN
MEMBERSHIP CARD ID
CARD NUMBER
MEMBERSHIP ID
NAME ON CARD
MEMBER SINCE
ADDRESS
CITY
STATE
ZIP
ADDED BY
CHANGED BY
DATE ADDED
DATE CHANGED
TSLONG
PRIMARY ADDRESSEE
PRIMARY SALUTATION
LOOKUP ID
LAST ORG GROUPNAME
CARD NUMBER
DISPLAY
REVENUE AMOUNT
REVENUE RECEIPT AMOUNT
REVENUE REFERENCE
REVENUE DATE
CARD
EXPIRATION
DATE
DELIVER TO
GIVER ADDRESS
GIVER CITY
GIVER STATE
GIVER ZIP
GIVER PRIMARY
ADDRESSEE
GIVER PRIMARY
SALUTATION
GIVER EMAILADDRESS
PRIMARY MEMBER
GIFT MESSAGE 
EMAIL ADDRESS
    

Helpful resources: Note: The membership card header file output cannot be edited to include additional merge fields. Additionally, it does not use Name Format Options, so the only available Addressee and Salutation values are those marked as primary on the member constituent record (Primary Addressee/Primary Salutation merge fields.)