As of August 29, 2025 U.S. customs changes now require additional steps when returning small parcels under $800. We’re all adapting, small businesses, Canada Post, and clients alike, so we’ve created this guide to hopefully make the process easier using our provided envelope.

Good news: If done properly, there are no customs duties or fees to pay.

If you prefer, you can ask a Canada Post representative if they can complete this process in their system for you. However, we’re not yet sure if this option is available everywhere.

Even if you decide not to complete the steps yourself, please read through all of them, as they may contain important information that could affect your shipment and prevent its delivery.

---

If using a different courier instead of Canada Post, the instructions below will not apply. However, it is very important to advise your chosen courier that their customs declaration must clearly indicate the following:

Contents: Radon Test Kit, return for analysis
Country of Origin: Made in the USA

If this information is entered incorrectly or omitted, U.S. Customs will charge import fees and or not deliver your test kit to the lab.

---

Step-by-Step Guide for Canada Post - 🎥 [Watch Video]

Step 1. Download the Zonos Prepay App

• For iPhone users: Open the App Store and search for Zonos Prepay.
• For Android users: Open Google Play and search for Zonos Prepay.

Step 2. Create Your Free Account

• Open the app and sign up using your name and email address by clicking on ACCOUNT in the bottom right corner.

Step 3. Start a New Shipment

1. At the bottom, tap Ship.
2. Select Is a Standard Package, then tap Continue.

Step 4. Add the Item Details.

The comments in this example for a long term test kit also applies to short term and radon in water tests. Please adjust the $ value accordingly.

1. On the next page, tap Add Items Manually.
2. Under Item Description, type:
   RADON TEST KIT, RETURN FOR ANALYSIS
3. Under Country of Origin, select United States.
4. Under Value, enter the amount. This example is for the return of 1 unit.
5. Tap Add Item at the bottom.

Step 5. Review and Complete

• You’ll see an overview showing $0.00 owing.
• Tap Complete.

Step 6. Get Your Declaration ID & QR Code

• The app will generate a 13-character Declaration ID and a QR code.
• Canada Post will need either the Declaration ID or the QR code to process your package.

Saving the QR Code:

• iPhone: Tap Share → Save to Photos.
• Android: Tap Share → Save Image (or “Download” on some devices).

Tip: If those options don’t appear, simply take a screenshot of the QR code.

You can show the QR code on your phone or provide the Declaration ID to the Canada Post clerk when you ship your kit.