That's a dangerous game. Even if the receiver doesn't notice at inspection time, they might discover it after delivery. They could notice the balls don't move w

That's a dangerous game. Even if the receiver doesn't notice at inspection time, they might discover it after delivery. They could notice the balls don't move while breaking apart the box. Or, the expensive object they received might exhibit damage characteristic of being tilted. At that point it may be too late to prove the shipper did it, but they'll definitely re-inspect the tilt-detector. If you're lucky, they'll never hire you again. If you're unlucky, they'll rehire you just to prove you defrauded them.