The storm chasers are out in full force after the recent hail storms. If you live in an area that was hit, you've probably already had visitors at your door. One of the inspectors on my team had people show up the very next morning. Storm chasing is a huge business for roofing and siding contractors, and it'll bring a lot of contractors into our area who don't normally do business here.

Most homeowners prefer to hire local businesses who will be there to take care of them if something ever goes wrong in the future, and storm-chasers know this very well. To help get past this out-of-towner roadblock, storm chasers will do their best to present themselves as local businesses too.
I talked to several local roofers and a couple of people who used to do what they describe as "shady storm-chasing work" to get advice on how to know that you're talking to a storm chaser. These clues are the dirty dozen. Just one or two of them might not indicate a storm-chaser, but the more boxes you check, the more likely you have a storm-chaser at your door.
1. "WE'RE WORKING WITH YOUR NEIGHBOR!"
This should probably be numbers 1, 2, and 3. Social proof is powerful magic for salespeople, and they all know this. The most powerful thing a door-knocker can tell you is that they're also working for your neighbor.
Frequently, they'll point to their yard sign next-door or up the street as evidence of working in the neighborhood. Signs may only indicate that the homeowner has allowed the storm chaser to speak with their insurance company, not that the claim has been successfully pushed through. There is a huge difference. The majority of storm-chaser related insurance claims get denied unless the damage is truly catastrophic.
2. THEY SHOW UP FASTER THAN HUMANLY POSSIBLE.
Storm-chasers win by being first. That's their schtick. They use sophisticated satellite technology to determine what neighborhoods to target, often within hours of the storms passing.
3. THEY CONVEY A SENSE OF URGENCY.
Storm-chasers insist that you need to get your roof fixed quickly. But you don't, and I can't stress this point enough: if you have hail damage, there is no rush to get it fixed. Even missing shingles do not immediately cause leaks. The underlayment is the primary waterproofing agent on the roof system and unless that is damaged, there's no need for emergency tarps.
I have never (NEVER) seen hail damage at shingles that could cause a leak. The rare case where hail might possibly cause a leak is when you have an old, brittle roof vent that has been destroyed by hail. Even in that case, you could probably patch it with a piece of ice and water shield to get you by for a while time.