Shipping cremated remains is one of those tasks most families never expect to handle. When the need arises—perhaps to bring a loved one home, send ashes to another family member, arrange a memorial in another state, or return remains after cremation—the process can feel unusually high-stakes. The good news is that the United States Postal Service publishes specific instructions designed to make the journey safer and easier to prepare for.

This guide explains the current U.S. mailing rules, the type of container to use, how to cushion and identify the package, and what changes when ashes are being sent internationally. It is written for practical planning, not as a substitute for checking the latest USPS and destination-country requirements immediately before mailing.

The most important rule: use the correct USPS service

For domestic U.S. mailing, USPS states that cremated remains—human or animal—must be sent using Priority Mail Express. USPS also states that it is the only shipping company that ships cremated remains. The Postal Service provides dedicated Priority Mail Express Cremated Remains packaging to make these sensitive shipments more visible and secure in its network.

This is worth checking before you buy packaging or make travel plans. Ordinary Priority Mail, Ground Advantage and a standard parcel are not substitutes for the required cremated-remains service.

Choose an inner container that is secure and sift-proof

The container holding the ashes is the most important layer of protection. Under the January 2025 edition of USPS Publication 139, a domestic inner primary container must be strong, durable, securely sealed and sift-proof. “Sift-proof” essentially means fine material cannot escape from the container.

For international mailing, USPS is more specific: the inner primary container must be a funeral urn, and it must be properly sealed and sift-proof.

That makes closure quality an important buying consideration if there is any possibility the urn will later be shipped. A well-made metal urn with a secure threaded or screw closure can be a practical choice because the container is rigid and the lid can be closed firmly. Appearance still matters, but for transport the first questions should be whether the urn is appropriately sized, structurally sound and capable of being securely closed.

If you are still choosing a memorial container, our complete guide to cremation urns for ashes explains capacity, materials, closures and memorial styles in more detail. You can also browse our modern metal cremation urns when a durable adult urn suits the family’s needs.

Use a second protective layer

USPS recommends placing the sift-proof primary container inside a sealed plastic bag. The guidance also recommends identifying that inner package with the complete sender and recipient information and the words “Cremated Remains.” This extra layer matters if the exterior shipping label is damaged or separated from the parcel.

It is also sensible to put a separate sheet of paper inside the outer box with the sender’s and recipient’s address and contact details. USPS specifically suggests this precaution so the shipment can still be identified if the exterior label becomes detached.

Cushion the urn so it cannot move

An urn should not be able to slide, roll or strike the walls of the shipping carton. Publication 139 calls for sufficient cushioning around the inner container to prevent movement and breakage in transit.

Think in terms of immobilizing the urn rather than merely surrounding it with a little padding. Cushion the bottom, all sides and the top, then gently check the closed box for movement before sealing it. If you can feel the urn shifting, add more protective material.

Use the USPS Cremated Remains box

Current Publication 139 instructs mailers to use the USPS Priority Mail Express Cremated Remains box as the outer shipping package. USPS offers dedicated kits through the Postal Store, including a kit with the box, tape, cushioning, a self-sealing plastic bag and a copy of Publication 139. USPS lists these packaging supplies at no charge; postage is paid when the shipment is mailed.

The dedicated box is intentionally conspicuous. That is a benefit, not something to disguise: clear identification helps postal employees recognize that the parcel contains irreplaceable remains requiring the prescribed handling process.

Domestic shipping checklist

Before sending cremated remains to another U.S. address, check each of these points:

• The ashes are inside a strong, durable, properly sealed and sift-proof primary container.
• The primary container is protected inside a sealed secondary bag.
• Sender and recipient details are included inside the package as a backup.
• There is enough cushioning to prevent the urn from moving or breaking.
• The correct USPS Priority Mail Express Cremated Remains outer box is being used.
• The complete delivery and return addresses are accurate.
• You have retained the tracking information and shared it with the recipient where appropriate.

If you are buying the urn online before shipping it onward, our online urn buying checklist can help you check capacity, measurements, closure and seller information before ordering.

International shipping requires extra checking

International mailing is possible only when the destination country accepts cremated remains and Priority Mail Express International service is available for that destination. USPS instructs senders to verify the destination country’s Individual Country Listing before mailing.

For an international shipment, the ashes must be in a sealed, sift-proof funeral urn. The customs declaration must identify the contents as “Cremated Remains.” USPS also notes that, when available, the cremation certificate should be attached to the outer box or kept easily accessible.

Do not assume that acceptance by USPS automatically means the destination country will admit the package. Local customs, documentation, import and cultural requirements can differ. Check the destination-country rules shortly before shipment and, where necessary, confirm requirements with the relevant consulate, postal authority or funeral professional.

Should you ship ashes or travel with them?

There is no universal answer. Shipping can be useful when the recipient lives far away or nobody is making the journey in person. Travelling with an urn may make more sense when a family member is already travelling for a memorial or interment.

Whichever route you choose, avoid making the decision solely on convenience. Consider the urn material, documentation, destination rules, timing and the emotional importance of the remains. When flying, check the current requirements of the relevant security authority and airline before departure; airline and international rules can differ from postal rules.

Common mistakes to avoid

Using an attractive urn that does not seal securely

A decorative urn can be beautiful but still unsuitable for mailing if its closure cannot reliably contain fine cremated material. For shipping, secure containment comes first.

Leaving empty space in the box

Movement increases the risk of damage. Proper cushioning should hold the inner container firmly in place.

Assuming every country accepts cremated remains by mail

International eligibility depends on the destination. Verify it before paying for postage or promising a delivery date.

Waiting until the day of mailing to gather documents

International shipments may require customs information and supporting cremation documentation. Preparing these in advance reduces last-minute stress.

Choosing an urn without considering future plans

If ashes may eventually be mailed, transported, divided among family members or placed in a niche, those plans can affect the most suitable capacity, shape and closure. Our guide on using an urn purchased online with a funeral home also explains an important part of advance urn planning in the United States.

A careful process protects more than a package

Cremated remains are irreplaceable, so this is not an ordinary parcel-preparation job. The best approach is deliberate: select a secure container, follow the current postal instructions, protect the urn against movement, label everything accurately and verify international restrictions before the package leaves your hands.

Rules can change, so always check the current USPS guidance immediately before mailing. The official USPS Publication 139 remains the primary reference for U.S. packaging and shipping instructions.

Frequently Asked Questions

Can I mail cremated remains through USPS?

Yes. USPS permits domestic mailing of human and animal cremated remains when its requirements are followed. Domestic shipments must use Priority Mail Express and the prescribed cremated-remains packaging process.

Can I send ashes with UPS or FedEx?

USPS currently states that it is the only shipping company that ships cremated remains. For a U.S. shipment, follow the current USPS cremated-remains instructions rather than treating the package as an ordinary carrier parcel.

What kind of urn is best for shipping ashes?

The key requirements are secure containment and durability. For domestic USPS mailing, the primary container must be strong, durable, properly sealed and sift-proof. For international USPS mailing, the primary container must be a sealed, sift-proof funeral urn. A rigid urn with a dependable closure can be a practical option.

Can cremated remains be mailed internationally?

Sometimes. The destination country must permit cremated remains and Priority Mail Express International must be available. The sender must also follow customs and packaging requirements, including using a sealed, sift-proof funeral urn.

Do I need a cremation certificate for international shipping?

USPS Publication 139 says that, if available, the cremation certificate should be attached to the outer box or made easily accessible. Destination countries may have additional documentation requirements, so verify those separately.

Can I use my own ordinary box?

Current USPS Publication 139 instructs mailers to use the USPS Priority Mail Express Cremated Remains box for the outer shipping package. Check the latest publication before mailing in case requirements are updated.

Last reviewed: September 2026. Postal and international entry requirements can change; confirm current rules before shipping.