My experience was similar, though they did inform me about the charges to return the equipment if I used their call tags. I had heard the horrors that others have posted here and elsewhere and was bracing for the worst, documenting EVERYTHING, even going to far as to take photos of everything in the boxes before I packed them up. As it turns out, a week or so after I returned the boxes I got confirmation e-mails that they had been received and about a month later I got a bill crediting me for the remainder of my service and charging for the two receivers, clearly stating it was the final bill. There were no threats to turn in to collections, in fact, the only "threat" was that I would not be able to return to Dish in good standing until the balance was paid - almost as if payment was optional (I still paid, though, because it was the right thing to do).
The main reason I left Dish was the lack of MRV. When my current contract is up in 2 years I would consider going back to Dish if they have MRV by then.