Hello,

What happens with a token if it's a march for example after is resolved/used by the house?

Is it returned to his house or it can never be used again?

It is removed from the board. The player may use it again on his next turn.

Rulebook, Page 16:

Removing/Resolving Orders
Whether an Order token is resolved normally or removed from
the game board by other means, it is simply returned to its House’s
available orders, ready for use during the next Planning Phase.