Questions we get asked about

Shippers can ask Xoserve for details about a site to help them decide whether to nominate or confirm that site before adopting ownership.

This is known as a Shipper Enquiry. You can ask for details such as:

• capacity values
• meter class
• smart meter information.

Enquiries need to be submitted via Xoserve’s Information Exchange (IX) gateway.

Shippers must submit an S47 record (Supply Point Enquiry Request) and an S68 record (Enquiry Supply Meter Point) to enquire about a site.

The process in which a Shipper can cease to be the registered user of a Supply Point is called the Withdrawal Process.

This process can be initiated voluntarily by the Shipper (known as a voluntary withdrawal).

This list of Top SPA Rejections codes shows the reasons gives advice on how to manage the rejection.

A CSS site is a Supply Meter Point that will utilise the Central Switching Service (CSS) for the registration of Suppliers and Shippers.

The majority of sites will be classified as CSS sites with the exception of NTS Sites, Shared Supplied Sites, Supplier Exempted Sites and LPG sites.

For further information, please read our training material.

You’ll need to contact the Data Communications Company (DCC) to initiate a switch.

You can do this through their website.

Timescales for CSS are documented within the Retail Energy Code (REC) and the effective dates will be validated in Data Communications Company (DCC) Systems.

You can find file formats for the new switching flows in the REC Portal.

You can find all Shipper or Supplier files in the UK Link Documentation Library.

A gas Supplier will need to object or cancel a switch via the Data Communications Company (DCC). Any objections or cancellations will need to be completed in accordance with the documented timescales.