What’s changing?
Our reply postage sponsorship with Navy Federal Credit Union is ending.
However, if you purchased a Letter bundle before July 31, 2025, those letters will still include free reply postage, even if they are sent after July 31st.
* Letter credits expire 6 months from the date of purchase
Who gets free reply postage after July 31?
Only users who purchased a Letter (or bundle) before July 31st will continue receiving free reply postage on those Letters.
To be clear:
✅ This applies to letters purchased before July 31st and sent from the purchasing account
❌ Does not apply to Letters received through Support Squad donations
❌ Does not apply to courtesy Letters sent due to FedEx delays or customer service exceptions (ex, returned letters or letters not received)
❌ Does not apply to Letters purchased after July 31, 2025
Why is free reply postage ending?
Thanks to Navy Federal Credit Union, we were able to include over 1.5 million free postage-paid envelopes to help families stay connected. That sponsorship is ending on July 31, 2025, and the free postage will no longer be available after the promotion ends. Beginning August 1st, reply postage can be added to each letter.
What options do I have going forward?
You can still help your recruit reply easily with two options:
Add Paid Reply Postage: $1.99 per Letter at checkout (in-app only)
Send a Book of Stamps: Purchase and ship directly via the Sandboxx Shop
How does paid reply postage work?
When added during checkout, we include a pre-addressed, prepaid envelope in your Letter so your recruit can write back without needing to purchase a stamp.
What if I don’t add reply postage?
Even without reply postage, your Letter will still include:
Stationery
A return-addressed envelope
Your recruit can still respond by supplying their own stamp or using stamps you send separately.
Who can I contact for help?
Our Customer Happiness Team is here for you. Reach out anytime through the app or at support@sandboxx.us.