The policy that TSADude brought up is the policy used at my airport.

lisamcgu,

If you bring the remains to the checkpoint, make sure if it's in one of your carry-on bags you take out. That will save you a possible bag check. My airport usually places a item in a bin and then places the remains on top of it to see if we can see the item below through it, and we haven't had to send one person to check them yet.