It will depend on the courier service delivering your items. Some couriers require a signature to make a delivery, and so may leave your parcel with a neighbour or try to redeliver at another time.
Alternatively, they may leave your delivery in a safe place or at a postal depot.
If any of these is the case the courier should leave a card with details of where to find your parcel or update your tracking link with this information.
If you know you aren’t going to be in most couriers provide the ability to divert to a neighbour or collection point. This can be done via the tracking link we have provided you.