You can tell lies in the way you label a code. For example, if you
shift the contents of a closed collection from Potter Library to Bourne Library,
you can change the underlying branch code while keeping the displayed label
the same. Maybe you would add an asterisk or a dot after 'Potter Library' so that
desk staff are in on the ruse. This would be no good for open stacks of course, where
users need to know where things are actually located.