Which LP's provide ID cards? Are they even valid proof?

I thought the only proof currently is the sticker on your bottle, so are the ID things sent by some LP's valid? My friend signed up with Peace Naturals and got one

nope, the cards are just a marketing gimmick.

According to the paperwork I was sent, the valid (legal) part is the prescription. So the label on your bottle is supposed to be just as legal as a pharmacy label. The card is just a thing so the cops can call the 800 # and verify that you do have a proper prescription. (for whatever that's worth)

Tweed gives your a card. But your supposed to put a sticker on the back of your card that comes with your order. The sticker has your date of purchase on it.

Canna farms...no card

Tilray gives out a patient card with the welcome package in the first order, it is literally useless unless you are trying to place an order over the phone. They send an extra prescription label with each order (on top of the ones on the individual strain packages) and that is supposed to serve as your proof. If I get stopped or arrested at some point and police say it is not valid I will be sure to post about that, as of yet though I have not been harassed even though the local cops follow my twitter and know I have marijuana on me at all times.