You don’t have to be a legal eagle to predict Donald Trump won’t get far with his legal threat against Bill Maher.

The progressive host of HBO’s “Real Time with Bill Maher” joked on “The Tonight Show” earlier this week that he would donate $5 million to charity if Trump could prove he wasn’t the “spawn of his mother having sex with an orangutan.”

Trump quickly had a copy of his birth certificate sent to Maher’s people along with a note demanding the $5 million.

Attached hereto is a copy of Mr. Trump’s birth certificate, demonstrating that he is the son of Fred Trump, not an orangutan. Please remit the $5 million to Mr. Trump immediately and he will ensure that the money be donated to the following five charities in equal amounts: Hurricane Sandy Victims, The Police Athletic League, The American Cancer Society, The March of Dimes, and The Dana-Farber Cancer Institute.

Should Maher not pay up, Trump says he will “probably” sue the star of the anti-religion film “Religulous.”