In September, an Inverness resident got a shipping notice that her packages had reached town. She was leaving for an overseas trip in two days, and the boxes held specialized sound recording equipment shipped from the U.K., Australia and Eastern Europe. They weren't at her house, so she went to the post office. There she learned they had already been sent back overseas because they were addressed incorrectly. According to the Point Reyes Light, she was told, "This is how things are now. I am only following the rules."
The federal mail manual decides where a package addressed to a P.O. box goes based on which line the box number sits on. For years, a postmaster who knew local box numbers by heart covered for labels that didn't follow it. The Inverness and Bolinas counters now apply the rule as written, so the address on the label has to do the work that used to happen behind the counter.
The workaround that lived behind the counter
Home delivery routes are limited in both Inverness and Bolinas, and many households get their mail through a P.O. box. That collides with how online shopping works. As the Light reported, many retailers, Amazon among them, won't ship to a P.O. box. UPS and FedEx deliver straight to the door, but other shippers don't. If a package carries only a street address and goes through the post office, it ends up at the counter with no box attached to it.
Small-town postmasters have room to soften that. The Light describes holding a package behind the counter for a few weeks, slipping a note into a customer's box, or picking up the phone. That's how it worked under Lynn Baring, Inverness's postmaster for two decades. When she announced her retirement last year, residents threw her a party.
Under Baring, Inverness had its own addressing trick. You put your box number right after your name, as in "Bertha Jenkins 128," the Light's example, and your street address on the next line. Shippers accepted it because a street address was on the label, and the clerk knew which box to use. Bolinas had its own version, with the street address and box number on one line under the name, separated by a forward slash.
Both formats depended on someone at the counter reading the label generously. Both towns now have new postmasters: Nicole Johnson in Inverness and Josie Castaing in Bolinas.
How the instructions shifted over a year
The guidance hasn't come all at once or stayed consistent. Here's the sequence the Light reported on Sept. 23:
- Last year: Baring announced her retirement after two decades as Inverness postmaster.
- This summer: Inverness box holders who had used their street address got "final reminder" notices telling them to stop, though they say they never received a first reminder.
- Along the way: Customers in both towns were told to use "general delivery," then later told that advice no longer applied.
- Over the past year in Bolinas: Customers were advised to use four different address formats.
- Early September: A notice in the Bolinas post office window warned that starting Sept. 26, improperly addressed mail would be returned to sender.
The Bolinas notice gave the reason. It said mail with a street address that belongs in a P.O. box "must be handled manually, creating additional and unnecessary work, which decreases efficiency of providing postal services to the rest of the community."
Another Inverness resident told the Light his package went back within 24 hours of arriving, and he only learned it from a tracking alert. "In the old days, if a package ended up over there, they'd reach out or they'd hold it for a few days," he said.
Three formats, two rules
For a label that carries only a box, the mail manual's recipient services chapter says mail for a P.O. box "must show the assigned PO box number in the address immediately above the city, state, and ZIP Code."
For a label that carries both a street address and a box, the rule is Section 2.1 of the Domestic Mail Manual's addressing chapter, headed "Dual Address":
Mail with a dual address (both a street address and a Post Office box number) is delivered to the address immediately above the city and state (or to the Post Office box if both the street address and Post Office box are on the same line).
The same section says that a ZIP or ZIP+4 code has to match whichever address element it sits under, and that the rules apply to return addresses too. The national address standard, Publication 28, writes a box address as "PO BOX" followed by the number.
Here is how the formats in circulation compare with that text and with what the Postal Service says locally:
| Format on the label | Who has pointed to it | What the mail manual says |
|---|---|---|
| Name / PO BOX ## / Inverness CA 94937 | USPS spokeswoman Kristina Uppal said customers should "almost always" use this three-line form | Section 508 requires the box number immediately above city, state and ZIP, which this does |
| Name / street address / PO BOX ## / city, state, ZIP | Uppal said this four-line alternative "might be acceptable" in some cases | Under the dual-address rule in 602.2.1, delivered to the box, since that line sits just above city and state |
| Name / street address and box number on one line / city, state, ZIP | A Bolinas attorney who read the regulations argued this is a valid third format, and many Bolinas customers have used it for years | Under 602.2.1, delivered to the box when street and box share a line |
| Name / street address only / city, state, ZIP | The format retailers ask for when they won't ship to a box | No box on the label, which is the kind of package being returned |
Each of the three box formats matches wording in one of those two sections. The label that falls outside both is the one with no box number at all, which used to get through because someone at the counter knew who lived where. Baring's old name-and-number format falls in between. The box number sits on the name line, not on a line the manual recognizes as an address, so it's the kind of label that depended on a clerk reading it kindly.
Uppal also told the Light that when a private shipper won't ship to a P.O. box, "customers may have options depending on local availability," and that customers "should however coordinate any alternate addressing format with the local Post Office in advance to help avoid delays."
The post office's street address, where it's offered
One of those options has a name. USPS calls it Street Addressing. Where it's offered, a box holder can use the post office's own street address plus their box number to receive packages from private carriers. Publication 28, Section 284, describes the format as the post office's street address with the box number preceded by "#" or "UNIT."
The mail manual treats it as an add-on at what USPS calls competitive P.O. box locations. Packages still have to meet USPS mailability rules.
For Inverness, that would look like the post office's address at 12781 Sir Francis Drake Blvd. with a box number after it. The catch is availability. USPS publishes a weekly list of locations moving to competitive Street Addressing. The list dated Oct. 19, 2026 did not include Inverness's ZIP, 94937, or Bolinas's, 94924. The list changes every week, and the counter can tell you whether it applies to your box.
A note on cost, for anyone who has wondered why some neighbors pay for a box and others don't. The mail manual says P.O. box service is free for customers who aren't eligible for carrier delivery. That category, Group E, has conditions. The address has to be inside the post office's delivery ZIP Code and be a potential delivery point, with no carrier delivery at or near it for reasons USPS defines. The full eligibility language is in Section 508.
Before the December crunch
The holiday deadlines make this matter now. USPS has posted its 2026 holiday shipping dates. For delivery before Dec. 25 within the lower 48 states, the recommended send-by dates are:
- Thursday, Dec. 17: USPS Ground Advantage and First-Class Mail
- Friday, Dec. 18: Priority Mail
- Saturday, Dec. 19: Priority Mail Express
USPS notes that actual delivery depends on origin, destination, acceptance time and other conditions. A gift that bounces back from Inverness in late December won't have time for a second try.
USPS's own advice is to sort out any non-standard format at the counter ahead of time, and the counter keeps weekday hours only. The Inverness Post Office at 12781 Sir Francis Drake Blvd. lists retail hours of 8:30 a.m. to 4:30 p.m., Monday through Friday, closed Saturday and Sunday. The Point Reyes Station Post Office at 11260 Highway 1 opens a little earlier, 8 a.m. to 4:30 p.m. on weekdays, also closed on weekends. USPS lists General Delivery and PO Box Online among the services at both.
A practical habit fits in here too. Check the saved addresses in your shopping accounts against the formats above before the December orders start. That's especially true for any account still set up with the old name-and-number line from the Baring years. Under the manual's dual-address rule, the box number has to sit on an address line, either the line just above the city or the same line as the street address.
This is general information about published postal rules, not legal advice. For anything about your own box or deliveries, the Inverness or Point Reyes Station counter is the right place to confirm.
Mail is one of the small systems that makes a West Marin address work, and buyers moving here from the city rarely hear about it until a package goes missing. If you're new to Inverness, or helping someone settle into a house out here, call or text Terry Donohue. She's glad to share what she knows about the everyday logistics that come with a home on Tomales Bay.