Door-to-door salespeople are regularly seen in neighborhoods around the country. In recent years some local municipalities have begun requiring such salespeople to register with their city clerk’s office, but there are still the rogue ones that just show up. The Better Business Bureau has some advice to deal with either type.

How can you know if a salesperson is from a real company? Check identification, check the company’s BBB Business Profile, and ask about licensing. BBB investigator Don O’Brien says if you make a purchase and then have second thoughts, there is a method of recourse.

To avoid being pressured into a sale, O’Brien reminds it’s ok to say no. Door-to-door marketing scripts are designed to keep potential customers engaged in a conversation as long as possible, but a legitimate salesperson will understand if you politely and firmly tell them you’re not interested. You don’t owe anyone your contact information or a purchase.