A computer glitch is being blamed after the private details of more than a thousand Vehicle Testing New Zealand customers were accidently circulated by e-mail.

Yesterday, the company sent out reminder e-mails alerting motorists their registration was due.

However, attached was a list of 1780 names and addresses of other customers who were also sent reminder notices.

VTNZ is currently investigating the privacy botch up, but say at this stage it appears only a small number of customers received the attachment.