Retainage Release Invoice

Hi Experts,

My question is can we create a retainage release invoice by matching it to a Standard Purchase Order & also

Can we create a retainage release invoice without matching it to the PO?

I have successfully created retainage release invoice by creating and matching it to the Complex Service PO.

Also tried to create a retainage invoice (without matching to PO) by defining a supplier and entering retainage rate at the supplier site and giving retainage account

in the Financials Options (Payable Setup), but could not create it.

Any help will be highly appreciated

Thanks in advance

Regards

Pooja