What happens when you switch guilds? Do you lose anything?
Just whatever perks the guild has that affected you
the war boxes - you may have to confirm that first. someone in our guild joined just in time to fight the war that got us promoted, however she did not receive the rewards. So, acknowledge this when you switch.
and yes, exactly what fury said, the perks - if you’ve been used to buying market at the discounted rate, you might notice that you don’t.
good luck 