Gellman has posted an article here about questioning 3 color SPA RPA's. I agree with him. Just buy a two color in my opinion. Check out his article. I hate to piggy back on someone else's post, but I am going to do it anyway. This post is about preventing the fake patches.
First, anyone who pays for a logo patch unless it's a 1/1 or /10 or lower is just begging to be ripped off. Plus who cares? I'm not going to pay $200 for a logo or shield that is probably fake and if it isn't, anyone that I might sell it to would think it is fake anyway.
UD has put out some acetate cards:
As you can see, the patch is trapped in the card and cannot be faked.
Donruss began using some sort of Kodak authentication where you could send the card to them and they could authenticate it for you. No dice Donruss. That doesn't do anyone that is trying to buy a card any good.
Here is a solution. Once the cards are done, T, UD or Panini could label the back with stars. 1 star for one color , 2 for 2, 3 for 3, 4 for 4, L for logo, S for shield. Depending on how the jersey pieces are put in, it could be done at the time of printing.
Another solution would be to print Donruss authentic across the card like a watermark. The watermark would only be visable with black light. If a scammer tried to change the patch the writing wouldn't match up.
Solution three. Much like an Oregon drivers license, amongst other states, put a low res pic of the patch on the back of the card.