Absolutely, the QR Codes generated by TocToc can be customized to a certain limit with the free version. In the free version, you can add a customized welcome message for your visitors, visible after scanning your QR Code to leave you a message. With the premium version, you can customize the TocToc Vignette, the poster containing your QR Code that you can print and display on your door, by adding a personalized message. In addition, you can secure your QR Code by setting an access password, thus limiting access only to people with the password.