In our old trailer the fridge latch wouldn't hold any more so I bought the 'Baby Lock' for fridges. It worked great! But it does mean that you have to stick it to the fridge on the side and front and you may not want to do that.
My first trip, I had no problems with the fridge opening, but the last trip I took the door opened both times. I think it was the way I loaded the fridge this time. I have been contemplating putting a velcro on the fridge as well.