Disney has today released an update to the My Disney Experience website to give guests the option to opt-out of receiving an additional MagicBand. New MagicBands are usually sent automatically with every stay at a Walt Disney World Resort hotel. Those staying onsite will now have the ability to opt-out of automatically recieving the band - but, they must have an exisitng active band linked to their account, and the MagicBand must be less than a year old - this is because the MagicBand's operational lifespan is limited due to its non-replaceable battery.
Guests will need to opt out each reservation they make if they do not wish to recieve a new band, and guests can also opt back in to get a new band sent.
The update has not been pushed to mobile apps yet, and is only available on the My Disney Experience website...