Please specify what parameters for creating a TTN of Ukrposhta you do not need to transfer?
For as such, Ukrposhta does not have the same-name parameters "Return Delivery" and "Payment Control".
Perhaps you mean the postPayPaidByRecipient parameter - the party that pays the postpaid transfer fee?
So that if you have one of the payment methods selected in the settings - do not send postPay (amount after payment) and postPayPaidByRecipient as a recipient?
I do not observe a separate parameter that would work similarly to "Payment Control" (that cash on delivery be transferred by bank transfer) in the documentation of Ukrposhta
https://dev.ukrposhta.ua/uploads/API-documentation-12052020.pdf.