I received a customer concern yesterday which said that I improperly RTS'd a package. I deliver to a local marina which has a policy of not accepting deliveries for boaters without prior approval. Thursday I had a package for a boater which was promptly RTS'd. I had another one yesterday for the same boater which I also promptly RTS'd. Shortly thereafter I received an ODS asking me to call the center. I did and was told about the concern. I reminded them of the marina policy and the fact that there is a sign placed right behind the checkout counter which clearly spells out their policy. I asked the marina for permission to take a cell phone pic of the sign. They asked me if the boater had given us a hard time, as he had given them a hard time, and I told him that he had and they told me to take the picture, which I did and then sent it to my center manager's cell phone. He downloaded the pic, printed and attached it to the concern. The boater is a Canadian and unfortunately they don't think the rules apply to them while they are here in the States. The concern was closed out as invalid. The evening clerk, who was also shown the pic, told me she would have loved to have RTS'd this package as well. My point? Not all customer concerns are valid ones and you should provide your mgt team with proof of invalid concerns.