Delivery and ordering online

One of the factors to be considered before ordering anything online, is whether it is possible to be at a particular place at the time of delivery. For example if a person has to be at another place at the time of delivery, it is not advisable to place an order online, as the item will be returned undelivered.
So when a person has to go to another place for urgent work like cheque deposit, the online order will have to be postponed for some time at least , till the customer has the flexibility to adjust the routine accordingly and be present at a particular place for delivery of items ordered online.