Please make sure that the membership software prompts a ward clerk to ask recently-married women about their preference for their surname. It’s 2014.
Some women don’t change their names when they marry. Some hyphenate. Some create a new hybrid name. Many Mormon women now live in countries where naming conventions are different than in the U.S. Though at one time it might have made sense to default to [first name] [husband's surname], it no longer does.
Stop making women feel like they’re causing trouble by asserting their own preference in something as fundamental to identity as their NAME. Mormons, of all people, should understand and respect the power of names as a marker of identity and change.
I recognize that this may create some significant extra work for programmers and Membership Clerks. It’s ok. Think of all the time that will be saved when we don’t have to write conference talks or press releases assuring women that they matter, because we show them all the time in practical ways like this that we respect them and their agency.