Can I add submissions to a form on the back end?

I have a form that requires a credit card transaction.  Some of the people that wanted to use the form could not do so and had to provide payment through a check from their organization.  I would like to add their registrations to the database and not have to go through the form?

If you are looking to import your already collected data into the form, this is possible if you have it in a CSV, or Spreadsheet file. Please check this guide: https://www.jotform.com/help/308-Import-App-Easily-Import-Your-Excel-or-CSV-Data-into-JotForm