Cafeteria woes

Last Friday I received once of those automated phone calls which usually are from a telemarketer or a doctor's office reminding you of your next appointment, informing me that my son's school lunch account was in the negative $9.80.
Hmm. My son takes his lunch to school everyday. He doesn't have an account with the school cafeteria. I check the school departments website to see what we are to do in a case like this, and see that all students are issued a "randomly generated pin, making it difficult for someone to gain access to the number". Oh really. After quizzing him to be sure that he has not been getting extra meals, I wrote a note and sent it on with him to school today. The note simply said that J takes his lunch everyday and has never used the cafeteria line for food. When I came home from work today, there was a message telling me that I was wrong, that my son was eating both breakfast and lunch everyday there and that they couldn't stop him from charging to his account. This is quite hum0rous, since J's bus gets there after the breakfast is done being served. Plus, he is a picky eater and wouldn't ever buy lunch. And lastly, my son does not lie to me! So when he tells me he has never charged to his account (which he did not even know existed), I believe him.
Tomorrow, I will go to the school, dragging J behind me, to ask the cafeteria manager if she recognizes my child, since she is insisting that he has served him breakfast and lunch everyday. I'm very curious to meet my son's doppelganger, whomever he may be.

UPDATE: We went to the school, the cafeteria lady finally acknowledged that she had never served my son, made all the others look at him so if someone was claiming to be him, they would know what the real J looked like. She also posted little notes on all the registers. We didn't get anymore automated calls, so I'm thinking it has been resolved. I'll keep you updated.