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Yes, but only through specific services with strict packaging rules. In the US, cremated remains go by Priority Mail Express only, in the postal service's dedicated cremated-remains box with Label 139 on all sides. In Canada, use a trackable parcel service with the remains in a sealed container and a cremation certificate attached.
This is general information, not legal advice.
This guide covers parcels and urns. Mailing a small amount of ashes in an envelope is a different matter, covered in our guide to mailing cremated ashes.
The rules below come from USPS Publication 52 (section 451.22 and Packaging Instruction 10C) and Canada Post's published requirements for mailing cremated remains.
| United States (USPS) | Canada (Canada Post) | |
|---|---|---|
| Allowed service | Priority Mail Express only, domestic or international where the destination country permits it | A trackable parcel service |
| Outer packaging | The USPS-produced Cremated Remains box (BOX-CRE); your own box is not accepted | A strong, durable outer container that is sift-proof |
| Inner container | Sealed and sift-proof, so no powder can escape in transit | Sealed container (urn or otherwise); fragile urns need cushioning |
| Markings | Label 139 (Cremated Remains) affixed to all sides, including top and bottom | No special label, but addresses must be complete and correct |
| Paperwork | Shipping label with the proper cremated-remains service codes | Certificate of cremation from the proper authority, in a plastic envelope secured to the top of the parcel |
Think in layers. The ashes go in a sealed inner container that cannot leak powder, the container is cushioned so it cannot shift or break, and everything sits inside a strong sift-proof outer box. A decorative urn is fragile by nature, so treat it like glass: wrap it, surround it with packing material, and make sure the outer box does not rattle when shaken.
The most common failure is an unsealed inner container. Ashes are fine powder, and any gap means a slow leak across the inside of the parcel. Tape the lid seam of the inner container and, for extra safety, place it inside a sealed plastic bag before it goes into the outer box. Keep the cremation certificate with the parcel, never inside the urn, and in Canada put it in a plastic envelope attached to the top of the parcel where staff can see it.
Honestly, it depends on the route. LetterAgent's shipping labels are Canada-only Xpresspost with a 5 kg maximum, and Xpresspost is a trackable parcel service, so a domestic Canadian shipment packed to Canada Post's rules above can go on a LetterAgent label. A US shipment cannot: USPS requires Priority Mail Express in its own dedicated box, which is outside what LetterAgent labels cover.
One more practical note: the remains of an average adult typically weigh between four and eight pounds plus the urn, so check the total against the 5 kg limit before you commit to any label. If the packed parcel is over the limit, you will need a different service.
Ready to ship it? Get a shipping label with LetterAgent: describe it to your AI assistant, approve the exact quoted price, and get your label.
LetterAgent is a working name. Prices include print, postage, and our service fee. US prices in USD, Canadian prices in CAD (Canadian prices exclude applicable sales tax, added at checkout). Currently in private testing.
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