 They just need either a very large percentage or a full upfront fee to get started. But Coleman says once you pay it, the contractor may not show up or do shoddy work. So research the company, get several job quotes and everything in writing. We always recommend paying with a credit card. So that gives you that extra protection if something goes wrong. If you are using a check, make sure that you write it to the company and not to the individual. Sandra Jones, WTOP News.