1. Solicit door to door
2. Request a large sum of money up front
3. Refuse to supply references
4. Display, or present, only an occupational license
5. Inform you that no permit is necessary, or suggest that you obtain the necessary building permit(s)
6. Offer to only work on nights and weekends
7. Fail to present, or display, a state certification or registration number on all proposals, bids, contracts, or advertisements
8. Offer Verbal Contracts only, or refuse to put ALL TERMS of the agreement in writing
9. Use high pressure sales tactics or offer a special discount price if you 'Act Now'