|The following is based on Fallout: New Vegas cut content and has not been confirmed by canon sources.|
Dear Mr. Elijah,
Congratulations on your winning luck at the Sierra Madre Casino! Your Complimentary Voucher will automatically delivered at the dropbox you specified every three days and can be redeemed at any Sierra Madre Vending Machine.
Thank you and we hope you enjoyed your stay!
The Sierra Madre Management
It does appear in game, however, as a terminal entry upon your return to the abandoned Brotherhood of Steel bunker, in Elijah's terminal.