Lisa Marie Presley won't have to pay her estranged hubby spousal support ... 'cause the postnuptial agreement they signed in 2007 says she doesn't have to pony up a penny and it's ironclad.
According to new legal docs obtained by TMZ ... the judge said the agreement Michael Lockwood signed in 2007 -- after they married in 2006 -- is legit. Michael gave up his right to spousal support, something they've been at war over for the last week.
Even though Michael testified he had NOT read the postnup when he signed it, the court ruled signing it on the advice of his attorney holds up because it means he understood what he was signing based on what his lawyer was telling him.
This is just the latest in Lisa and Michael's divorce war. She was ordered back in February to pay him $100k in legal fees.