They might be tired, personal problems, not deliver it to the right address or in a bad mood who knows for the most part they are okay.
A postman is to knock on the customer's door to deliver any package that does not fit in the mailbox OR any package or mailpiece that requires a signature. If no one is available to accept the package at the door or not available to sign for any mailpiece that requires signature, the postman will not leave the mailpiece. The customer must pick it up from their local post office. Packages that do not require a signature, may be left at the customer's residence at the postman's discretion. Another reason for non delivery is if the customer has an unrestrained dog on the premises OR if there is construction underway that obstructs safe delivery.
Thanks! Your answer is awaiting moderation.