I think that if you assume both the RTB are going to apply the Slip Rule and the Courts will let them, you might be confusing what would be the sensible thing to do with what will happen.
While we wait for Threshold or a FF councilor, or whoever, to advise a tenant to dispute the validity of one of the roughly 7000 Notices of Termination served each quarter due to a tenant apparently not receiving the Notice on the same day as the RTB, and for the RTB to adjudicate on it as to whether it wants to, or even is allowed to, apply the Slip Rule, and then for a Court to then opine.....we can ask ChatGPT for a potentially flawed answer:
Lets's try to force it to answer that the Slip rule can be applied.
But surely it is "otherwise compliant with this Act". The only error is the serving date - had that been the day the landlord assumed it was then the Notice would be compliant with the act?
The short answer is no, because "otherwise compliant" means the notice must meet every single rule of the Act at the exact moment the RTB reviews it.
Your logic frames it as: "If you remove the single bad ingredient (the late service date), the rest of the recipe is perfect." However, under Irish law, a late or mismatched service date is not a minor blemish on an otherwise good document—it is a fatal structural collapse of the notice itself.
The RTB cannot use the slip rule to bridge the gap between a landlord’s assumption and the physical reality for two absolute statutory reasons:
1. Compliance is Judged on Facts, Not "What Ifs"
Section 64A states that the slip rule can only apply if the notice is "otherwise fully compliant with this Act."
This is a high legal threshold. It means that when the RTB adjudicator looks at the notice, it must be legally flaw-less in every way except for the minor typo being corrected.
- The landlord's assumption: "I assumed it would arrive on Monday."
- The statutory reality: Because the post office delayed it, the tenant was served on Tuesday, and the RTB was served on Monday.
- The legal consequence: The moment those calendar dates separate, Section 62(1) explicitly dictates that "the notice shall be invalid."
Because Section 62 explicitly strips the notice of its validity when same-day service is missed, the notice is non-compliant at the time of the hearing. You cannot use Section 64A to save a notice that is already defined by the Act as fundamentally invalid.