Please Sir/Ma, can you share the link to the docs for Zero Dollar Payment using the paymentApi for customers residing within United States… Thanks for your understanding.
There isn’t any additional documentation. You’ll just pass 0 as the amount when you call CreatePayment. 
That’s what I am doing… But I am receiving an error message that the minimum Amount is 1 dollar
What’s the location_id of the account?
I am not close to that information now… But the services we render is only available in US