Walmart Heiress Divorce -- CHUMP CHANGE -- I'm So Rich, I'll Pay His Support

The heiress to the Walmart fortune is so rich she's asking a judge to allow her husband to take her to the cleaners.

Paige Laurie Dubbert -- whose mother inherited a multi-BILLION dollar chunk of the Walmart fortune -- just filed legal docs to end her 5 year marriage to Patrick Bode Dubbert.

Not surprisingly ... they signed a prenup, presumably protecting her fortune, but at the same time it gives her hubby the right to get spousal support if they divorce.

Well, almost 6 years of marriage, they're divorcing. In the legal docs -- obtained by TMZ -- Paige cites irreconcilable differences.

Apparently the spousal support won't put a dent in her wallet, because Paige says she's more than happy to write the check based on the amount agreed upon in the prenup.

She also wants to legally change her name back to Elizabeth Paige Laurie.

Elizabeth made headlines in 2005 ... when she surrendered her degree from USC ... after school officials learned she paid someone to write her term paper.