" I'm not 100% sure if this complaint is valid."

It isn't. It is just a SEO complaint.

Isn't there some kind of federal law where a receipt has to be issued? I'm not 100% sure if this complaint is valid.

On 3/29/12 a little before midnight I went through this Palmdale Del Taco drive thru and was told I couldn't be helped for 15 minutes because there computers were down. Do the computers make the food ? Have they ever heard of calculators ? Do they know people sold food before computers? This is crazy, I can't believe that's how there business is supposed to operate. Please hire employees that can add subtract and multiply so the operation doesn't stop because the computers are down.