Landlords must hand over personal information about tenants if rental properties in England and Wales get their water and sewage services from Welsh Water.
If they don’t, they could be held responsible for tenants’ outstanding water debts.
A new regulation introduced by the Welsh Government requires all landlords to provide information such as tenancy start date, name and date of birth of all adult residents within 21 days of them moving in.
The changes came into effect on at the start of this month.
Julia Cherret, Managing Director of Customer Services at Welsh Water said: “Due to the short notice of the new legislation, landlords are being given a three-month grace period by Welsh Water to help them prepare for the legislation and share the necessary details.
“This means that we will not take any action to enforce the regulations until 31 March 2015.”