If I might suggest making the change I underlined. "It's bad for your business" is the BEST way to get a businessman's attention and should be the first thing said. The rest explains why.
Originally Posted by cjurczak
I might even consider putting it on the front as follows:
Text on cards is as follows:
Front: Your sign is bad for your business. Turn over to learn why you should remove your sign.
Back: I saw your sign, and had to leave your business. Your sign is turning away law abiding citizens, but it WON'T deter criminals.
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State law requires that: I am NOT a felon, I am fingerprinted and background checked, I am certified in firearm use, and applicable laws. How much do you know about your OTHER customers? IllinoisCarry.com
This card would be applicable in other states as well (Modified to reference a different URL).