Here are 2 likely scenarios:
a) the postal worker put it in the wrong mailbox, or
b) what often happens is that a postal worker will scan in all the packages saying they were "successfully delivered" then spend that day and/or the next day delivering it.
If you do not get your package 2 days after the expected delivery date, let us know and we will file a trace with the post office. Canada Post will file an investigation which can take 5 business days to complete. If they can locate the package, they will ship it to you and you’ll get it a few days later. If it’s deemed "unrecoverable", we will send you a 1x replacement free of charge (UP TO $125). From Canada Post, the investigation involves contacting the addressee to confirm delivery, or to better understand how they receive their mail and, as applicable, if they checked:
with the front desk, security or mail room at the receiving address to see if someone else accepted the item on their behalf; their Community Mail Box for the item or parcel compartment key; around their property to see if the item was left in a safe location or in a mailbox attached to their home.
In rare cases, a delivery scan is entered into our system before the item is delivered. If you become aware that the addressee has received the item before we contact you, simply reply to this e-mail indicating the item has been received.