For letters sent to MCRD Parris Island and San Diego through SANDBOXX, the exact street number or PO box number is not important. Sandboxx letters are pre-sorted ahead of shipment their battalion, company, and platoon info only.
You might get an official letter from your recruit’s Drill Instructor or see that your recruit wrote down a different street or PO box number on their return address than the one in their profile. Don’t worry - as long as you have the correct battalion, company, and platoon information, your recruit will receive their letters.
You can find the correct street numbers and PO boxes using the below links:
MCRD Parris Island: http://www.mcrdpi.marines.mil/Recruit-Training/Contacting-A-Recruit/
SANDBOXX letters are presorted so that you don’t have to worry about the street address. If you find your recruit’s profile needs to be updated, just shoot us a message - we’d be glad to help.
For handwritten letters, which are not sent through SANDBOXX, please make an effort to include the right street number or PO box number. If you have questions about your recruit's address, just message us at Support@Sandboxx.us