There is no systematic process for checking Eircodes either when they are allocated to a building by computer or after they have been delivered in the door by a postman/woman. The tweet in the above image is one of many reports that verify this.
If you do not check your Eircode (and do it for those that cant) nobody will and, if not used for other purposes then, it could mis-route an ambulance the very first time it is used. There are several examples of Eircode mis-routing shown below.
Check your code now here