Assuming that you think "singular they" is an ok construction in english (e.g. "Some person will lose their keys" - article: http://www.visualthesaurus.com/cm/dictionary/dos-and-donts-for-singular-they/ ):
Is it ok if a string like this appears in a computer program:
"Catherine has lost their access to the system"
...or does it look too weird and wrong? The background for this is that "Catherine" is a user name in a database, and the program has no information regarding gender, so making the correct choice between "his" and "hers" isn't possible.
If this doesn't work, are there any suggestions for a construction that works around this issue? Would "Catherine has lost his or her access to the system" look better? What if the user name can be a group of people, like "Liverpool FC has lost his or her access to the system?"