To make someone else the mayor of your town say:
- /town set mayor <player_name>
For example to make Xavier Robledo the mayor of your town type:
- /town set mayor xavier_robledo
By doing this the town is no longer yours. The new mayor may delete the town at anytime and they are under no obligation to change the mayor back to you. This command costs 1000 gems + 50 gems per town plot. The gems must be in the town bank.