# Client Letter of Authority (CLoA)

To port a number, you will need to complete a Client Letter of Authority.

You can download the CLoA template from below:

Client Letter of Authority PDF Template

tel-cloa-v1.0.pdf 168KB

# Filling out the CLoA

It's important to read this section carefully before filling out the template, as if a field is entered incorrectly your port can be rejected by your current provider.

# Retailer

Field	Description
Name	Your current provider's business name
Address	Your current provider's company address (you can find this on Companies House)
Email	Your current provider's contact email (you can typically find this on a bill)

The New Retailer box has been pre-filled for you.

# Site address to register against numbers

This is one of the most important parts of the LoA as it is what your current provider will use to validate the port. If it does not match, the port will be rejected.

The address that your current provider has registered on their systems as to where your number is installed.

The site, installation or emergency addresses may different from your billing or postal addresses. A common cause of porting rejections is the site address being incorrect so we always suggest that you contact your current provider to clarify what they have on file for your number.

Regardless of the type of service, all UK geographic numbers have an associated address, although the name it goes by can vary (site address, installation address, emergency address, etc.). In the case of a VoIP service, it should normally be the end user's billing address.

# Numbers to be ported

This section must contain all the numbers to be ported. Please enter all the numbers in full UK national format, without the leading international prefix. (e.g. 020 7946 0123).

There are 3 columns to provide you space to enter the numbers you need, please start with the first one. If you need additional space for more numbers, you can finish adding more on the second page of the CLoA.

In the case of a sequential block of numbers, the entire block must be entered, even if you only wish to use part of it. Number ranges must always be ported between providers in their entirety. It may be possible to split the block up into smaller sets, but this would need to be approved and arranged with your current provider before the port went ahead.

# Main billing number (MBN)

This would be the main number in use with your current provider. If you only have one number, this number is the MBN.

Otherwise if you are porting multiple numbers, you may need to confirm with your current provider which number is the MBN. The MBN tends to be the main number you advertise for your business, or the first in a range.

# Customer's company details

Field	Description
Company name	Your companies full legal name (e.g. Acme Trading Ltd)
Company registration number	Your companies registration number (you can find this on Companies House)
Company address	Your companies registered address or billing address
Billing account number	This is the billing account number with your current provider (you can typically find this on a bill)

# Requester's details

An authorised member of the company must sign the CLoA. For the CLoA to be accepted, it must either be wet signed, or digitally signed.

Field	Description
Signed	The signature of the authorised person
Print name	The full, printed name of the authorised person
Job title	The job title of the authorised person
Date	The date of signing (in the format of DD/MM/YYYY)
Email	The email of the authorised person
Validity	The CLoA is valid for 6 months from the date of signing
Page number	The page number and total amount of pages

You must sign the Requester's details box on all pages of the CLoA.

# Additional sites and numbers to be ported

This section is only required if you have multiple site addresses and/or have more numbers to port than stated in the box on the first page.

Field	Description
Customer company name	Your companies full legal name (e.g. Acme Trading Ltd), repeated from the Customer company details section
Site addresses	The address of any additional sites, if associated with the primary site address you can leave this blank
Numbers to be ported	Any additional numbers to be ported

# Notes

This field can be left blank unless you have been instructed otherwise.

The CLoA has now been completed and may be submit to us to be processed.