Guide – How to undertake a water leak test for your business
Water leaks can pose a significant financial threat to businesses, silently draining resources while often going unnoticed.
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A business water letter of authority is used when a company wants someone else to speak to a water retailer or review account information on its behalf.
It is commonly requested to obtain accurate billing details, confirm supply and meter information, or investigate issues such as unexpected charges. A standard letter of authority is limited to information access and does not, on its own, allow changes to be made to a water supply or contract.
A business water letter of authority usually allows the authorised party to:
This access helps ensure that any advice or recommendations are based on accurate and up to date information.

A letter of authority has clear limits. It does not allow:
In some cases, extended letters of authority may be used that include permission to agree contracts, sometimes referred to as Level 2 authority. This is separate from a standard letter of authority and should always be clearly explained before being signed.

Businesses are commonly asked to provide a letter of authority when they want help understanding or reviewing their water account.
This may include situations such as investigating high or unexpected water bills, resolving billing errors, checking account details following a change of occupancy, or seeking independent advice on a business water account.
In all cases, the purpose is to access information, not to make changes without approval.

A business water letter of authority is legally valid in that it grants permission to access account information. However, it does not create a binding contract for water supply or services.
Any change to a water account, supplier, or agreement would still require explicit approval from the business.

Most business water letters of authority are valid for a defined period, often between six and twelve months. The duration should always be stated clearly on the document.
A letter of authority can usually be withdrawn at any time by notifying the relevant parties in writing.

A letter of authority should be signed by someone who is authorised to act on behalf of the business. This is typically a director, owner, or an individual responsible for utilities or finance.
If there is any uncertainty about who should sign, this should be clarified before proceeding.

No. A business water letter of authority does not affect the physical supply of water.
Water supply continues as normal. The letter only relates to communication and access to account information.

A water account review can be helpful if a business is unsure whether charges are correct, has experienced a sudden increase in bills, manages multiple sites, or has not reviewed its water account for several years.
A review allows potential issues to be identified before any decisions are made.
If you are also reviewing energy accounts, you may find it helpful to understand how a business energy letter of authority works.

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