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I was wondering what the process would be to reset chunks claimed by a player who has
A. Has shown little to no activity for over a month
B. The claimed area is empty of structures
In the wilderness players have up to 3 months (providing they are a member) to come back and start playing again (irrespective of if there is a building on it or not), after that if you notice some land get in contact with a member of staff and we'll look to getting their land cleared. If you know the player is a guest then they have only 2 weeks or their land can be reset, so if you know they are a guest please PM me their name and I'll sort things for you.
If you are referring to towns, you will have to check with your town rules and town staff.
Hope that clears things up for you.