Irish Water has confirmed that it has asked around 11,000 customers who submitted payment details in writing or over the phone to re-submit the information.
The company said that 9,000 customers who gave details of direct debit mandates over the phone were asked to re-submit them in writing, following concerns over data protection.
Another 2,000 customers who submitted payment details in writing were asked to do so again, because of what Irish Water described as "errors" in transposing customer details online.
The company said around 800,000 customers had registered in writing, far more than it had expected.
The utility will begin issuing the first quarterly bills to its 1.5m customers tomorrow.
The company has described the billing process as a significant task, and said it expects there will be errors in its database.
Staffing at a call centre in Cork has been increased to 750 to deal with customer queries during the initial billing period.
Staff at Irish Water and their customer service agents based at the Abtran call centre have been involved in a dry run on Irish Water's billing system for several weeks.
Today the system goes live and tonight the first 39,000 bills will be issued to customers across the country.
Billing is being rolled out on a phased basis over an eight-week period and during that time bills will be posted or emailed to every region of the country.
A total of 1.7m bills will be issued, including to those who are not customers of the new utility, such as to people on group water schemes.
RTE News April 7,2015
See our Boycott Campaign Article
It is interesting that RTE has reported the company as saying " around 800,00 customers had registered ". Last week it was 1.3 million or was it 1.5million.
Buncrana Together know that there is a lot of people who have registered that are opposed to Irish Water. They were coerced into signing Irish Water's registration form. We advise you to read our article Buncrana Against Irish Water Say Don't Interact With Irish Water.