To quote from NickServ's help text, NickServ's purpose is to help avoiding nickname confusions on IRC . There is no such thing as ``nickname ownership'' , however NickServ sends a warning to anyone else who signs on with your nickname. If you don't use IRC for 10 weeks, your nickname registration expires for reuse.
Only a NickServ operator can change your NickServ password. To find out which NickServ operators are online, send
/MSG NickServ@service.de OPERWHO
Nicknames with a `` *'' next to them are online at the time.