# What happens if I change @user to @user2? Will both be notified?

This also came up in this post.

What happens if I change @user to @user2 in a comment by an edit? Will both be notified?

The system seems to have at least a trigger, since using @'s in a comment triggers the “One additional @user” box after editing, even though the user don't exist.

• Of course, if the strings were indeed $\text{@}$user and $\text{@}$user2, the edit would have no effect at all: only the first three symbols are used to match comments to users. – user53153 Jan 11 '13 at 0:02

• Yes. Thanks. $\phantom{space}$ – draks ... Jan 11 '13 at 9:30