How to Get a Parcel From a Postal Worker

If you live in the UK and you put in your postcode, it'll bring up like a drop down menu. I'm pretty sure the building we're in right now has its own postcode. Which is just insane for those of us from other countries that use a handful of digits. There's a few places where you just have to put the postcode on, you know the thing will get delivered. A friend of mine in Limerick, someone put his nickname on a letter and it got delivered to him. It was just his nickname and then Limerick. Do any postal workers listen to this?