Everything

To name something is to define it; to name someone is to have control over them. For this reason, among others, mages often hide their identities, taking on craft names and adopted monikers that differ from their full birth names. The New World Order, of course, has access to any legal record they care to check… which gives them an edge when they want someone’s True Name. From a technomagickal standpoint, an American’s Social Security Number might work just as well as… or better than… her True Name if the mage wants to hold power over that citizen.

In game terms, the Storyteller may rule that an enemy with someone’s True Name – that is, her full legal name, perhaps with childhood nicknames attached – might act against that person as if the enemy has a unique personal instrument (-2 to casting difficulties). That option might be a bit too powerful for comfort; then again, such power could underscore the point that we take privacy too lightly in this era…