If they are a doctor and they write you the recommendation, you are good to go. The recommendation is essentially just a doctors statement that in their professional opinion, and using their right to free speech, they are recommending marijuana to treat a condition you have.

There are no costs if your doctor will write it, I had to go through a pot doctor that only writes recommendations, and charges about $150 per visit, (which isn't covered by health insurance), but you won't have to worry about that if you can get your own doctor to write it. Just take that written recommendation to a co-op, they verify the recommendation with your doctor, then let you go on and buy whatever you want.

All of your doctor records are private between you and your doctor, it would be illegal for somebody to publish them publicly.

Bookmark this site, read through Prop 215 so you know exactly what the law says. If you want to go legal you will want to know your rights, but of course remember Prop 215 doesn't exist to feds

Just curious, what condition(s) are you using it for?