I actually gave up ordering coffee with/after an evening meal many, many years ago as it was evident that oftentimes I would end up with leaded when I had ordered unleaded. As the OP stated, you really can't taste the difference, but at 3:00 a.m. when you're still WIDE awake, you know very well you did not receive what you ordered.

The only way you can be sure is either not order it at all, or take your own in a sachet.