Hello @KristenT58 ,
If the ticket is free, the registrant shouldn't be prompted to pay, nor even see anything alluding to them having to pay. Additionally, you shouldn't be required to select a payment option if all the tickets on your event are free.
I checked your account, and I do not see any built in the newer builder live, so I'm not sure how your contacts or registrants would've seen any prompts to enter payment info.
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