I've noticed the dead give away for those is that they come with a "Pre-sorted Standard" stamp instead of the first class postage that most personal mail uses.
I keep getting the same one from a certain car dealership every few months. Apparently handwritten address on envelope, real ordinary first-class postage stamp (even placed at a slight angle, so it doesn't look like a machine did it). Postmarked from a different state than the dealership is in. No return address.
Open it up though, and the deception ends immediately. Just your usual tacky, glossy printed brochure.
Open it up though, and the deception ends immediately. Just your usual tacky, glossy printed brochure.