What good is hiring a flyer delivery company if some, most or all of your flyers don't actually get delivered?
How do you know if the "walkers" are actually going door to door and putting your flyer/door hanger on the door, even if GPS shows them slowly walking down the street.
The answer is "you don't know" but there are a few things you can do to quickly get a feel of a door to door distribution company BEFORE you use them.
First - check out their reviews on sites like Yelp.
Second - call the owner of the company and get a feel of how they talk to you. Ask questions to satisfy yourself that this company will treat you right.