When purchasing the cheapest dummy ticket online, it's important to avoid common mistakes that could lead to scams or legal trouble. A dummy ticket, often used for visa applications or travel proof, looks like a real flight reservation but isn't meant for actual travel. Key mistakes to avoid include falling for scams, choosing unreliable providers, not verifying the ticket's legitimacy, and misunderstanding refund policies. To ensure a safe purchase, research providers, read reviews, and check for secure payment options. Also, compare prices, validate the ticket's authenticity, and understand its limitations. By following these guidelines, you can make an informed decision and avoid potential pitfalls when buying a dummy ticket online.