Final answer:
When a standard post with an address change is undeliverable, it is forwarded to the new address on file, such as P.O. BOX 942859 for a DMV change of address. A societal shift to digital messaging is an example of a change in demand affecting postal services.
Step-by-step explanation:
When an undeliverable standard post with an address change service and a change of address on file is sent, it is rerouted to the postal office location specified by the change of address request. In the case of the address provided, it would be redirected to: P.O. BOX 942859, Sacramento, CA 94259-0001.
This is often associated with public service agencies such as the DMV, where an individual might have filed a DMV change of address. Thus, despite a shift in preferences away from traditional mail to digital messaging, certain services still require or benefit from the use of snail mail.
Concerning economic principles, the shift toward digital communication represents a significant change in demand for postal services, as more people opt for electronic mail resulting in less reliance on traditional mailing services.