Unable to get parcel deliveries from An Post

Presumably everyone in the apartment complex will have the same problem? Shouldn't be difficult to co-ordinate with your neighbours to approach the management company in numbers that they can't ignore.

I don't think there is any offence here. While it is an offence to obstruct An Post, or its employees and agents, in the execution of postal duties, I don't think a passive failure to provide access to premises where post is to be delivered would constitute the offence. If it did, everybody who found their post was not being delivered because they had locked their gate, or left a menacing dog at large in their garden, or whatever, would be committing a crime, and that's not how the provision has ever been understood. There's no positive duty in the legislation to allow An Post access to premises for purposes of making delivery. I think the assumption is that people want their post to be delivered; there is no need to threaten them with the criminal law to force them to facilitate delivery.