It's a mail in rebate. There's a sticker on the plastic wrapping of the Blu-Ray. On the back of the sticker it gives the instructions.
Here's a condensed version:
Send:
1. ORIGINAL receipt of the Blu-Ray which contains the store and date purchased with purchase price of Monty Python & The Holy Grail circled.
2. E-Receipt which was emailed after the purchase of the iPad app.
3. Name, complete street address (PO boxes not accepted except in ND), city, state and zip code printed on a piece of paper.
Send to:
Monty Python and the Holy Grail $5 Rebate
P.O. Box 8185, Stacy MN 55079-8185
Conditions:
-1 rebate per person, family or household address.
-Requests for refunds without all of the requirements won't be honored or returned.
-Offer good only in the 50 US states, District of Colombia & Canada.
-App must be purchased by 04/16/12.
-Rebate request must be postmarked by 04/16/12 and received by 05/16/12.
-Please allow 12 weeks for delivery of refund.
-Refund will be in US dollars.
Check status of your request at:
http://holygrail.mycheckstatus.com
I guess this wasn't all that condensed after all...
I just skimmed the instructions so be sure to double check everything on the sticker in case I missed something/got something wrong.