If you use Whoppah, it is not allowed to pay with Tikkie or cash. This applies even if you visit the seller. We assume that you complete the transaction via Whoppah. This is not only safe and easy, but also very important for us as a startup, as it is our source of income. We can exist thanks to the small commission we charge, and hopefully help you many more times in the future. In addition, as a buyer, you are protected, and as a seller, you can be sure to receive your money. This is how we guarantee safe trading.