on the ones I have done, where the original PMI was as LPMI Single Premium, we rolled the old MI policy to the new loan, they call it a HARP Modification, so there was no new premium charged, with some MI companies they do charge a fee to do the Modification, MGIC charges a 1/2 point as an example
Only works on HARP refis
I have been able to do quite few of these, every MI company has a differnt policy so double check
if you are a broker or correspondent lender, you will need to check with your lender/investor