Lotto players are being warned of an unofficial MyLotto website tricking people into giving up their account information.
Lotto New Zealand has sent out emails to people registered on the MyLotto app, which allows players to purchase tickets online.
"The website, nz-lotto.co.nz, looks just like our official website, MyLotto. However, [it] has no association with Lotto NZ,'' the email said.
"Sites like this are designed to fool users into providing their username and password information.''
Lotto NZ said there were strong security management practices in place designed to protect the personal information of players.