Seems that just as soon as I've asked the question I managed to find the answer as well. Selecting "new form" button displays an option copy an existing form. That allowed me to copy the form easily. It works within the organization but not between tow different organizations. That's a shame. Hopefully that functionality will come in the future.
The email address to send this charge's receipt to. The receipt will not be sent until the charge is paid. If this charge is for a customer, the email address specified here will override the customer's email address. Receipts will not be sent for test mode charges. If receipt_email is specified for a charge in live mode, a receipt will be sent regardless of your email settings.
So your best option is to not map the Email field under payment settings, and the receipt will not be sent from Stripe.
On a related note, I will add you to our list of customers who will be invited to beta test our "soon to be released" support for custom document generation. This will allow you to send custom merged documents directly through Cognito Forms.
Best Answer
To disable a form without deleting it: