Before you buy or sell online, ask the seller directly:

• Is this product listed in the Florida DBPR database? Can you show me the listing?
• Do you have the manufacturer's registration number for this product?
• Is this product also FDA-authorized? Can you share the FDA listing?
• How recently did you verify this? Databases update, and you want the latest info.

If the seller can't answer these questions, that's a warning sign.