Some people their nicks were dropped while they forgot to identify so this way might help you for auto identify if u are using mIRC or any script based on it like
How to set it
Go to tools on the top bar then Options ---> Connect ----> Option ---> Perform then mark Enable perform on connect
and go to Perform commands: then type the command for the identify with your own password /msg nickserv identify <yourpassword> .
If you didn't identify for 30 days .. your nickname will be dropped and anyone else can register it ... and if it happened its not our problem when people come ask about their nicknames since we always advice for identify ur nick each time u come in