@O_G
For what it's worth I have never heard of such a thing as a (dedicated) "recovery disc". Not as a standalone product.
To my mind, the OEM Windows Master disc is, also, the Recovery disc. Hence why there is a Certificate of Authority number and sticker.
Most sellers will have, in the item description, a note to the effect that they are retaining a record of the product serial number, as a deterrent to anyone trying the switch-for-a-broken-one trick.
Not casting aspertions at yrneh, just saying to go back and look at the product description in detail. Is there a photo of the serial number? (for your privacy, don't post links to the item, if it has photos of the number etc)