What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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Does the paypal tool have to be a fixed price?Asked by mdinh on May 13, 2014 at 07:19 PM
With the paypal tool, the setup wants me to add products and their fixed price amounts.
Is there a way for the customer to choose to pay, for exmaple, their invoice, which there would be a textbox for them to type in the invoice number and then another textbox to put in the amount?
Yes it is possible to allow your customers to input the amount in textbox and then proceed to payment. To achieve your requirement, you need to set the "Collect Donations/Custom Amount Payments" of your PayPal setting. Please check the screenshot below :
Please take a look at the following demo form and see if this is what you wanted to achieve: http://form.jotformpro.com/form/41322611529952 Feel free to clone this form for a closer look. The following guide should help you in form cloning: https://www.jotform.com/help/42-How-to-Clone-an-Existing-Form-from-a-URL
Hope this helps.
Do get back to us if you have any questions.