How to add OTP in the Signature field?

Hello Studio_Fonio,

Thanks for reaching out to Jotform Support.  I am using a translator to understand your question so please bear with me. In any case, still, feel free to answer back in your local language if that would help you express your issue better. If you prefer for someone to help you in your local language, just let us know so we can forward it to them. Meanwhile, I will answer your issue in English.

Unfortunately, it's not possible to add OTP in the Signature field. While the feature you’re looking for isn’t currently available, rest assured we’re always working to add new services and features to Jotform. I've gone ahead and escalated your request to our Developer Team. When or if it's developed depends on their workload, how viable it is, and how many other users request it. If there are any updates, we’ll circle back to this thread and let you know.

Thanks for your patience and understanding, we appreciate it.