An issue with emails

I have an event booking form on my site. When a user submits event booking, two emails are sent.
One is event confirmation and the other is an invoice email (in my case it is 0 invoice). How do I avoid send invoice email ?

Thanks in advance

Hi @pcaltair

Do you have any payment fields / payment type added in the form code? or is the “Accept Payment” option added in the form builder?

Does the Event have a price set up on it (even if $0)?

Yes there is accept payment field and payment is zero. I took it out and it is ok now. Thx for the tip.