Free LED light bulbs

[Fred]

I can understand why they want your fiscal no & reference de l'avis to check your entitlement and at first look it does seem genuine, but I'm not sure I would want to pass that information over to them as I don't know what access it gives them.

I have read mixed responses on some French sites about it, so I'm still not sure so I'll wait till you report back.

Q: Do you have to give your credit card if you go for the free ones?