What happens if the seller isn't home at collection time? If, more importantly, the buyer isn't home at delivery time?

Do they get carded so they can pickup from their local SmartSend depot, of which their would doubtless be many to compete with AP?

i won't use couriers - I can't be there in the large pickup window they want, nor am I prepared to inconvenience the buyer if they are not home when delivery is attempted.