JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
If you are looking for a way to ensure that your users are entering a specifically crafted code, such as a license plate or a similar predictable combination of letters and numbers, you can use an Input Mask to control what can be entered:
I hope this helps. Please let us know if you need further assistance.