Recently flew with Hunan remains in the form of ashes,
Not an urn - the approved container suitable for x-Rays.

Told the good folks at the screening that they were ashes. That I had the necessary paperwork. That they could do ANYTHING they wished EXCEPT open the container. This was communicated. Slowly. Calmly, with certainy. They scanned it, but never touched the container.

No idea why one would check an urn into checked baggage. If they cannot scan it? Urns are sometimes metal. They must open it. Urns don't open easily, and spilled ashes is a common occurance. Checking an urn into the hold is a careless move on the part of a passenger,