There are two ways: 1) QUIET DEL listname UsErId@node QUIET ADD listname userid@node fn ln 2) SCAN listname UsErId@node and if none is found, then QUIET ADD listname userid@node fn ln /Pete At 10:10 07/05/1999 Monday , Jacky Foo wrote: >Is there a way to avoid duplicate names of subscribers just because >LISTSERV is unable to differentiate an address because it is case >insensitive ?