[mothered]

I think they're not liable for missing or lost packages so I don't know if DNA would work. 

Correct, hence the DNA Is out of the question.

I've heard WIR Wont work as they double check and record them packaging it? Would EB Work? It's a light weight bracelet

They check goods at the time of packing, thus It cannot be EB'd.

You can box them, but find out If they're liable for loss of goods with returns.