Nintendo has sent out an email to Club Nintendo members saying that all the Stars saved up as part of the company's loyalty scheme will start to expire at the end of June.
"Per the Terms and Conditions of the Nintendo Loyalty Program, some users' Stars will begin expiring at the end of June," the mail reads.
"Stars that have been in your account for 24 months will expire at the end of the 24th month. Starting 1 June, you can log in to your Club Nintendo account to see if you have any Stars that are about to expire."
"If you spend your Stars in June, the ones about to expire will be the first used for purchasing items. Learn more about the expiration at our Terms and Conditions page."
Nintendo Stars can be exchanged for Wii Points although there are only a certain amount of points available on a daily basis. So if you can't exchange them before June, you could simply lose them.
By Mike Bowden