I had a similar problem several months ago. Went out in the golf cart, put the remote in my pocket when I got to my destination. When I came home and pushed the button to open the garage door, my next door neighbor's garage door opened instead, and mine did not. I did a Google search and learned how to reprogram the code to my garage. Unfortunately, when I tried it both doors opened. After much checking the internet was able to deprogram the neighbor's code. I suspect the neighbor's code was probably one digit different than mine. This does make one wonder if there are devices out there that can break the codes
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