According to SNOPES (who usually are on top of things) this is true:
FBI agents conducted a "search and seizure" at the Southwood Psychiatric
Hospital in San Diego, which was under investigation for medical insurance
fraud. After hours of poring over many rooms of financial records, some
sixty FBI agents worked up quite an appetite. The case agent in charge of
the investigation called a local pizza parlor with delivery service to order
a quick dinner for his colleagues.
The following telephone conversation took place:
Agent: Hello. I would like to order nineteen large pizzas and sixty-seven
cans of soda.
Pizza man: And where would you like them delivered?
Agent: To the Southwood Psychiatric Hospital.
Pizza man: To the psychiatric hospital?
Agent: That's right. I'm an FBI agent.
Pizza man: You're an FBI agent?
Agent: That's correct. Just about everybody here is.
Pizza man: And you're at the psychiatric hospital?
Agent: That's correct. And make sure you don't go through the front doors.
We have them locked. You'll have to go around to the back to the service
entrance to deliver the pizzas.
Pizza man: And you say you're all FBI agents?
Agent: That's right. How soon can you have them here?
Pizza man: And you're over at Southwood?
Agent: That's right. How soon can you have them here?
Pizza man: And everyone at Southwood is an FBI agent?
Agent: That's right. We've been here all day and we're starving.
Pizza man: How are you going to pay for this?
Agent: I have my check book right here.
Pizza man: And you are all FBI agents?
Agent: That's right, everyone here is an FBI agent. Can you remember to
bring the pizzas and sodas to the service entrance in the rear? We have the
front doors locked.
Pizza man: I don't think so.
Click.
