Five Finger Death Punch Singer -- This Lady Is a Liar ... We Were Never Married

Five Finger Death Punch singer, Ivan Moody, says the divorce papers filed against him don't make sense 'cause he was never married to the lady who filed them.

Ivan's manager tells TMZ ... this is just a shameless attempt by Holly Smith to grab attention ... saying her domestic violence claims are bogus and were dismissed back in July ... and that there's no marriage certificate anywhere.

The manager tells us Holly also made false claims about Moody being the father of her child.

TMZ broke the story ... Holly is filing for divorce and accusing Ivan of trying to strangle her. He was arrested for domestic battery after his hands allegedly ended up around her neck during a dispute over cheating claims. That charge was later dropped.