I’ve noticed an uptick in the number of posts about this lately. It happened to me for the first time not too long ago as well.
I filed a strongly worded complaint and returned it. Others have done the same or gotten them to exchange it, though it took some arguing. Not an option if the figure is long sold out.
Sideshow will say it’s because the shipper is damaged or the shipper is not part of the figure (despite selling a double boxing service).
But people have said they felt the figure might’ve been opened previously, so there’s a possibility it might be a return in some cases as there’s precedence for that. The one I received did feel like an open box item and it was packed out kind of messily.
Whatever the reason, it’s put me off from ordering from Sideshow directly so I’ll try to go elsewhere when I can.