How to Serve Notice Wales: Landlord Service Rules and Deemed Dates

A perfectly completed RHW16 form means nothing if you serve it incorrectly. Section 237 of the Renting Homes (Wales) Act 2016 sets out exactly how a statutory notice must be delivered. Get the service wrong and the notice is invalid — regardless of how long you waited or how carefully you filled in the dates.

Legally Recognised Service Methods

Welsh law recognises four methods of serving a possession notice:

Personal delivery — handing the notice directly to every joint contract-holder. This is the most reliable method because you can prove exactly when service occurred. If there are joint contract-holders, each one must be served individually.

Postal service — sending the notice by recorded delivery or ordinary first-class post to the dwelling address or the contract-holder's last known address. Recorded delivery gives you a track-and-trace receipt. Ordinary first class works legally but is harder to prove.

Premises delivery — inserting the notice through the letterbox or leaving it at the property. This is valid but carries risk: you have no independent proof the contract-holder received it unless you have a witness.

Electronic service — email delivery, but only if the contract-holder has given explicit prior written consent to receive formal notices electronically. A casual email exchange doesn't count. You need clear, documented consent specifically for statutory notices.

The Clear Days Counting Rule

When calculating when the notice period begins, the day you serve the notice is Day 0. The notice period starts on the following calendar day.

Worked example: you serve a section 173 notice on Form RHW16 on 10 October 2026. The six-month notice period begins on 11 October 2026. The earliest permitted possession date is 11 April 2027.

This matters because the date you enter in Part D of the form must reflect the full statutory notice period. Writing 10 April instead of 11 April would make the notice one day short — and the court could refuse possession on that basis alone.

Proving Service in Court

When you eventually file a possession claim, the court will want proof that the notice was properly served. A letting agent's verbal statement that they "posted it" is not sufficient.

You'll need to complete Court Form N215 (Certificate of Service), supported by:

• Postage receipts and track-and-trace delivery confirmation (for postal service)
• A witness statement attesting to personal delivery (for hand delivery)
• Photographs with timestamps (if leaving at premises, as supplementary evidence)

Keep everything. The envelope, the receipt, the tracking printout, the witness's contact details. If you served by recorded delivery, keep the proof of delivery showing the date and signature.

Common Service Mistakes

Serving only one joint contract-holder. If there are two contract-holders named on the occupation contract, both must receive a notice. Serving only one doesn't create a valid notice against the other.

Relying on email without documented consent. Email is convenient but legally risky unless you have written consent specifically for statutory notice delivery.

Getting the possession date wrong by a day. The clear days rule trips up landlords who count the service date as Day 1. It's Day 0 — always start counting from the next calendar day.

No proof of service at all. If the contract-holder denies receiving the notice and you can't prove service, the court cannot proceed. Spend the extra money on recorded delivery.

The Two-Month Court Claim Window

After the notice expires, you have exactly two months to file a possession claim. This window opens on the notice expiry date and closes two months later. Miss it and the notice is dead — you'll need to serve a fresh notice and wait another six months.

You're also barred from serving a new section 173 notice for six months after the court claim window closes unused. So a missed window costs you at least 12 months: six months until you can serve again, plus six months of notice.

For a complete guide to the notice process — including the pre-service compliance audit, form selection, and court filing — see our Ending an Occupation Contract in Wales guide.

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