Heidi Montag and Spencer Pratt eloped in Mexico, but is their union legit?

The Hills stars, who claim they tied the knot in a wedding ceremony at a chapel near Cabo San Lucas on Nov. 20, don’t appear to be legally married.

According to Mexico’s foreign relations department Web site, Americans who wish to get married in Mexico must first go through a process that takes about five days. They must obtain a health certificate, including blood test results from a local doctor; and provide official translations of legal documents, such as birth certificates.

Considering Heidi and Spencer say they had just about an hour to prepare for the wedding, it seems as though their marriage is about as real as their show.

On Wednesday afternoon, Spencer said, “Like other elopements that happen outside the country, we’ll take care of the legal details when we get home.”