Many apartment complexes do have packages delivered to USPS lockboxes attached to the mailboxes or increasingly Amazon Lockers. In other cases delivery people

Many apartment complexes do have packages delivered to USPS lockboxes attached to the mailboxes or increasingly Amazon Lockers. In other cases delivery people can open an exterior door to access a hallway or ante-room that connects to individual residences and contains mailboxes and lockers. Or they might just leave the package there. Theft by a neighbor in the same building is vanishingly uncommon. But for larger items (or if delivery is to a house), it's common to just leave them at your door or on the porch (or just inside the outer door if possible). In some places this might be a theft risk (porch piracy), but in most it's just not. If you're worried, just request verified delivery so you have to sign for it. Today we have informed delivery services so you get alerted that a package is coming your way and can request that it be signed for yourself, even if you don't know who sent it.