How is he been trying to pay tithing and other offerings? Does he want to do it by using a Tithing and Other Offerings paper slip with a check or online at the churchofjesuschrist.org/donations site? Donations made by check or online must be done using the local currency and thus a country specific bank. For online donations, if he has a home country (Norway?) bank and wants to make donations in Norwegian krone he could send an email to
onlinedonationsupport@ldschurch.org. They may be able to flag his account so that he can donate online to the church in Norway using an Norwegian bank account.