U.S. Postal Service Post Office Box or a private postal mailbox (PMB) address may be used as the mailing address of record for receiving information regarding a Santa Ana business license; however, a Post Office Box or PMB address does not constitute a business location for business licensing purposes. A Post Office Box or PMB address cannot be substituted as the business location address for any business, whether physically located within the City of Santa Ana or physically located outside of the City of Santa Ana.