How can I add a sibling discount?

how to add a sibling discount to my summer camp form? 

 

Ideally, they would just add the name of the sibling that is already enrolled

I checked your form: https://www.jotform.com/90785567436168 but you don't have any Payments fields or products that can be used for the discounted feature.

Please check our payment list integrations and add one to your form: Mastering Payment Form Integrations with JotForm

You can then add coupons or discount to your form: How to Add Coupon Code to Payment Forms.

Please let us know if you are referring to something else so we can check for other possible options.

Hello,
That isn't my form. This is the form I would like to use:
https://form.jotform.com/90785467836171
...

Since the items are listed in Square payment, the only way to get a discounted price is to create a coupon code. How about this workaround?

Create a coupon code and show it if certain conditions are met? For example, if the user proves that other participants or names are his/her siblings or the surname is the same then show the coupons so they can enter it before the checkout.

Guide: 

> How to Show or Hide Fields Base on User's Answer

> How to Add Coupon Code to Payment Forms