I have found way to do this. I run sql query that deletes the patrons in the borrower table, but exempted the Koha Admin patron. ---------------------------- Original Message ---------------------------- Subject: delete of default patrons From: "Nadel Catura" <caturan@canlubang.dlsu.edu.ph> Date: Wed, September 9, 2009 12:51 pm To: Koha@lists.katipo.co.nz -------------------------------------------------------------------------- We have a newly installed Koha in our system. For beginners, we chose to install also the sample patrons. UNfortunately, our librarians chose to encode the real users of our libraries. How can we delete the Patrons added during the installation? Thanks in advance for the help.