That can be fixed with intelligent trade agreements . Trust Trump . <| sep |> Don ' t bring Cantina Alien # 8 in to this . He didn ' t do anything wrong . <| sep |> Sorry to hear that . If the tx is dropped it will revert to your wallet . If it ends up in the marketplace wallet you should be able to get it back or be credited with it . If you believe they will not treat it like your btc ie . steal it , then you can make a last ditch effort to double spend it with a higher fee . Miners will drop the first tx if they see a second one paying a higher fee using the same inputs . The problem is that the double spend may likely not be accepted by the network and relayed to any miners . It is worth trying if you are sure the btc will be stolen upon late arrival . You can do a double spend in Electrum but it is a hack requiring a few wallet file edits and then creating a new tx with higher fee and pushing it through other nodesservers .