Coachella’s campgrounds houses a small post office which, according to the Press Enterprise, is barely a post office. It used to be run out of a tent, but has since been moved into a life-size version of a Lincoln Log cabin, a popular children’s toy. Megan Hampton, who runs it, described it as more of a halfway point between the festival and a real post office.

People generally use it to mail postcards or send merchandise they bought at the festival back home. Hampton said that people have tried to mail some weird things, including one couple who sent out their wedding invitations so they could say “Coachella” on them.

However, the strangest thing people have sent has been their taxes. Coachella began this year on April 15, which is usually Tax Day. However, this year it was pushed back to April 18 as Washington, D.C. celebrates Emancipation Day.

At least 10 people tried to mail their taxes through the campground post office on the first day of the festival—a reckless choice considering the mail doesn’t have a return address and, as Hampton says, the destination isn’t always written out carefully considering the senders’ level of sobriety.