sequential invoice number

Hello coxtech,

I am not sure if I have understood your question correctly. We have received an empty response from you with just the title as "sequential invoice number".

Do you want to generate a sequential number after every form is submitted?  Yes it is possible to achieve your requirement. You can add "Unique ID" widget in your form which will generate a unique number for every submissions. It is also possible to customize the number by adding prefix and padding numbers as well. The following guide should help you:  http://www.jotform.com/help/79-Add-Custom-Unique-IDs-to-your-Form-Submissions 

Hope this helps.

Do get back to us if you have any questions.

Thank you!