If you are not home at the time of delivery, most carriers will leave a card to advise you that they have attempted to deliver that day. Most carriers will re-attempt delivery up to 1 time free of charge but this can vary depending on the courier.

If you know you will be out for a period of time when the delivery is being made you can leave a note on the door for them to leave your package in a safe place, as long as a signature is not required.