When sending letters to MCRD Parris Island or San Diego through Sandboxx, you may notice that the street number or PO box number differs from what your recruit includes in letters sent home. This is completely normal and will not affect delivery.
Sandboxx letters are pre-sorted before shipment based on battalion, company, and platoon information—not the specific street address. We use key unit identifiers such as Recruit Training Battalion (RTBN), Company, and Platoon to ensure each letter is routed efficiently and delivered to the correct recruit. As long as this information is accurate, minor address differences will not impact delivery.
You may receive an official letter from your recruit’s Drill Instructor or see a different street or PO box number listed on your recruit’s return address. No need to worry—if the battalion, company, and platoon details are correct, your letters will arrive at the right place.
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/
For handwritten letters that are not sent through Sandboxx, you should use the street or PO box number provided directly by your recruit.
To maintain consistency and ensure proper delivery, handwritten letters should always follow the exact address your recruit provided. Sandboxx letters work differently, as they do not rely on detailed street addresses and instead use hierarchical unit information such as Company, Battalion, and Platoon to route mail correctly.
Additionally, if your recruit is part of the Navy, please note that Sandboxx no longer receives address information from Great Lakes due to recent policy changes. Navy recruits now provide their mailing addresses directly through USPS Mail. You can add this address to Sandboxx by setting your recruit up as a new recipient.
Please also keep in mind that Sandboxx letter delivery does not require extended ZIP codes, so those details can be omitted when addressing your letters.
If you have questions about your recruit's address, just message us at happiness@sandboxx.us.