RF Labels on Electrical/Electronic Devices

Hi All,
I am a novice when it comes to the use of RF technology on porducts.

The product I am working on intends to have RF to prevent re-use of a single use device (its a bilogical contact product and there is suggested evidence that it might be possible to re-use despite labelling to the contrary). The RF label is to prevent the code being recognised again by the receiving system.

Any pointers on what to look out for and the relevant performance testign that I would need for the product in question?
Thanks
Fialor