New Zealand Post is apologising to customers following security problems with its online shopping service.
Customers of YouShop, which lets them order goods online from the USA, UK and Europe, were told last week that other account holders who logged on to the site have been able to access "some limited account information".
Account holders were told in an email last week that a privacy issue had been reported by a YouShop customer. "It appears that this user was able to see some limited account information in another YouShop user's account after logging into the site," it said.
The email said as an added precaution, login access to the NZ Post online account would be restricted until further notice.
"Partial credit card details, mailing addresses and some product information were accessed," an NZ Post spokesman said.