Company called “National Credit Systems” have the “PO Box 4115 Concord CA” address. Its a collection agency located in Concord. But they have lot of bad reviews on BBB and do your own research when dealing with them.
Post office box benefits
post office boxes are really safe. they’re lockable, sometimes they have a key, sometimes they have a combination, and you can get that from the post office that you are reserving your box at. This safety and security allows you to remain private. Nobody knows whose box is whose and this is confidential information that’s kept with the postal service.

So like I said there’s a whole bunch of benefits to having these kinds of boxes. These boxes vary in price. So depending on where you live, you could pay more or less for a post office box. because these fluctuate slightly depending on the municipality or the city you live in because obviously having a box in a in-demand urban area, is going to command a higher price than maybe in a rural area where there’s not a lot of theft, where there’s not as much of a need for being able to walk in after work and collect all your documents on the way home. So like I said this allows for a lot of benefits especially for urban dwellers.
Related : https://whalegrows.com/po-box-30425-salt-lake-city-utah/
How to get PO box
So, if you’re looking to reserve your own postal box you can now do that online or you can do that in your local post office. they will set you up with a box, maybe you’ll have a choice of the size, based on the location you might have 24 hour access or just regular lobby access. So it’s important to ask those questions when you’re deciding to get a box and looking into that as an option. For a lot of people a post office box is a great solution to fix a lot of their problems and there’s a reason why these things are so popular.
Related links
https://www.usps.com/manage/po-boxes.htm