Versions of Montana Code 30-4-406. Customer\'s duty to discover and report unauthorized signature or alteration on LawServer 2023 Montana Code 30-4-406. Customer’s duty to discover and report unauthorized signature or alteration 2022 Montana Code 30-4-406. Customer’s duty to discover and report unauthorized signature or alteration 2021 Montana Code 30-4-406. Customer’s duty to discover and report unauthorized signature or alteration 2019 Montana Code 30-4-406. Customer’s duty to discover and report unauthorized signature or alteration 2018 Montana Code 30-4-406. Customer’s duty to discover and report unauthorized signature or alteration 2016 Montana Code 30-4-406. Customer’s duty to discover and report unauthorized signature or alteration 2014 Montana Code 30-4-406. Customer’s duty to discover and report unauthorized signature or alteration 2013 Montana Code 30-4-406. Customer’s duty to discover and report unauthorized signature or alteration 2009 Montana Code 30-4-406 – Customer’s duty to discover and report unauthorized signature or alteration