The Third party vendor replied saying
<platformCore:reference internalId=“1513” type=“invoice”/>
customer payment is the target transaction type (you’re creating a customer payment)
type is the source transaction type (you’re creating this from an invoice)
1513 is the internalId of the source transaction (the invoice you want to pay)
This would return a payment record, which you would then need to submit to save it to NetSuite. That is the part that I’m not sure if you can do with SnapLogic. Either way, it might be worth trying this to see the XML that it returns. This might tell us what we are missing in the payment add request.
Is it prossible to implement this in snaplogic ?