What do I write in a final demand so it actually works?

By the time you are writing this letter, the chasing emails have failed. The next document is different in kind: it is the first page of a court file, written in the hope the file never grows.

What the letter must contain

Courts expect pre-action correspondence to a recognisable shape, set by the pre-action protocols under the Civil Procedure Rules. Whatever the debtor, the working core is the same:

• Who owes what, and why: the contract or quote, the work done, the sum outstanding, and the date it fell due. Attach the schedule: valuations, certificates or applications, and payments received.
• What was already said: one or two lines on the chasing to date, with dates.
• The interest position, stated accurately for who they are: statutory interest and fixed compensation under the Late Payment of Commercial Debts (Interest) Act 1998 where the debtor is a business, or the contract rate where one exists. The split has its own page, and claiming interest you are not entitled to weakens an otherwise strong letter.
• A clear deadline and a named next step: proceedings in the county court, or adjudication where it is available.

Which protocol, and the thirty-day point

Debtor is a business: construction disputes sit under the Pre-Action Protocol for Construction and Engineering Disputes, and your letter of claim should set out the claim plainly and allow a proper period for response before issuing.

Debtor is an individual, which on a domestic extension is your client: the Pre-Action Protocol for Debt Claims applies, and it is stricter with you. It expects prescribed information and reply forms with the letter and gives the debtor 30 days to respond before you issue. Skipping it does not kill the claim, but courts can penalise the shortcut in costs, so on consumer debts the patient version is also the tactically correct one.

Send it so it lands

Post it to the right legal identity at the right address, and email a copy. A letter addressed to a trading name that is actually a limited company, or to a site instead of a registered office, hands the recipient a week of “we never got it”. Two minutes on the Companies House register settles who you are actually owed by.

What to do this week

1. Build the schedule first: applied, certified, paid, outstanding, dated. The letter is a cover page for the schedule, not a substitute for it.

2. Confirm who the debtor legally is, and pick the protocol accordingly.

3. Set the deadline you named in your own calendar, and be genuinely ready to take the next step, because a final demand followed by silence from you is training the debtor for the next one.

Where the information stops

This page describes the expected shape of the step before proceedings. It does not draft your letter, and on a consumer debt the protocol’s prescribed enclosures need to be right. A fixed-fee letter before action from a construction solicitor costs a fraction of the debt on any job this series is written for, arrives on letterhead the debtor takes seriously, and is the point where professional drafting starts earning its money.