[wiredfool]

An Post is one of the intended users of the EirCode system. I'm tempted to try a letter or postcard to the eircode, just to see if it gets delivered.

e.g.

  Name
  Eircode

Ireland also makes it reasonably common that you won't have a number in the address.

  Someone
  Foo House
  Town 
  Co Meath
  Ireland

Is a perfectly reasonable and somewhat common address.

[donalhunt]

It's actually quite amazing that Ireland survived without postcodes for so long.

The following format is probably the most common:

  Name
  Townland
  Co. County
  Ireland

Townlands could have 200+ people. Maybe more in some areas.

[wiredfool]

Oh definitely, my townland is at least a couple of estates, at 100+ houses each.

And then there are the creatively named estates, where the whole street name is stop words. One near me has "[number] The Avenue", "The Court", "The Close", "The Drive".

Townlands are optional, or it can be the name of a large road near you. I think there are at least 3 addresses corresponding to my house that are used by official government mail, one of the things that EirCodes were supposed to prevent.