Minn. Stat. § 325G.24
Any person who has elected to become a member of a club may cancel such membership by giving written notice of cancellation any time before midnight of the third business day following the date on which membership was attained. Notice of cancellation may be given personally or by mail. If given by mail, the notice is effective upon deposit in a mailbox, properly addressed and postage prepaid. Notice of cancellation need not take a particular form and is sufficient if it indicates, by any form of written expression, the intention of the member not to be bound by the contract. Cancellation shall be without liability on the part of the member and the member shall be entitled to a refund, within ten days after notice of cancellation is given, of the entire consideration paid for the contract. Rights of cancellation may not be waived or otherwise surrendered.
Minn. Stat. § 325G.24
1974 c 418 s 2