Update: the Argutinski problem is now playing out in live determinations - and the slip rule isn't saving anyone.
Following on from the thread above about Argutinski v RTB - the High Court ruling that a posted notice is served on the delivery date, not the posting date, which contradicted the RTB's own guidance.
A new Tribunal determination shows this is no longer theoretical.
TR0001618 (June 2026): a landlord served an own-occupation notice, posted it, and filed the copy with the RTB the same day he posted it - exactly as the RTB's longstanding guidance told him to. The Tribunal applied Argutinski and held the notice invalid: because the posted notice was deemed served on the tenant a day or more later (ordinary course of post), the RTB copy filed on the posting day was not "same day" as service.
Notice void, under s.39A(1) and s.35(11).
So a landlord who did precisely what the RTB website told him to do lost his notice. That's the harm the original thread predicted, now landing in real cases.
And here's the part that should worry every landlord: the slip rule didn't save him. You'd think "filed the RTB copy a day early because the State's own guidance said to" is the textbook case for the remedial-notice provision (s.66(2A)) - an honest, non-material, guidance-induced slip. But the Tribunal treated the service failure as a standalone, independent ground of invalidity, and because the notice also failed on a second ground, the remedial route was never even engaged. The notice simply died.
In fairness, that second ground did for him anyway - the Tribunal wasn't satisfied he genuinely intended to move in, so he wasn't keeping the property regardless. But it doesn't blunt the point:
the service/same-day-copy failure stands on its own as a ground of invalidity, and it's now killing notices in its own right.
And where a curative provision has been squarely tested, it's been refused. In the Swords driver's-licence case I posted about this morning, the tribunal considered the slip rule and declined to apply it; in the Rathgar case, an identical defect was cured. Same provision, opposite results. The cure exists - but whether it rescues you is a lottery.
A landlord following official RTB guidance to the letter can still have his notice struck down, with no remedy, for a "defect" the State's own guidance caused.
As
@Sarenco rightly raised on the original thread: Argutinski itself didn't rest solely on the service-date point (the notice there had other fatal flaws). But TR0001618 removes that comfort. It's clear from this case that the service-date/same-day-copy failure is set out as a standalone, independent ground of invalidity in its own right.
For a body about to gain powers to fine landlords for getting the rules wrong,
it is remarkable that the RTB's own longstanding, published guidance has been setting accommodation providers up to fail - and that when they fail because of it, the cure is refused.
Notes:
Case here
"Finding 1:
The notice of termination dated 12 February 2024 is invalid, the Landlord not having established that a copy of the notice was served upon the Residential Tenancies Board on the same day as the notice was served upon the Tenant."