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In an ad-hoc network, some nodes relay more communications than others. Since relaying is resource consuming, unfairness in terms of the number of communications relayed by different nodes is not desirable. This paper discusses a simple charging/rewarding scheme as a method to reduce the unfairness in the network. We explain the reason why such a scheme works well in a mobile network but does not work well in a static network and discuss some methods to improve performance in the static network.