Invalid email in contact list

When one of our users types particular letters in email address, the type-ahead suggested list of contacts contains an invalid email address. I cannot locate the source of this email address - I have switched off the ‘save recent contacts’ and deleted all previously saved contacts. I have checked all Domino Address Books for aliases etc.Where is type-ahead list generated from?

Subject: forwarded to development

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Subject: The information is coming from the $users view. Can you bring up your MyContacts view and do a Cntrl-Shift F9 to cause it to rebuild this view. Thanks