Are Genius Bar appointments logged to your apple I.D. or your serial number?

I took my MBP into the Genius Bar today and I completely messed up my description of what was up and the Genius gave me a quote for a part I know for a fact is functioning perfectly due to my lackluster synopsis. Anyway, my question is a simple yes/no question, please no answers offering alternate solutions. Just want to know whether Genius Bar appointments are logged on the system so they could see I've been in today if I wanted to go in tomorrow. If so are they linked to my Apple ID or MacBook serial number? If it's the ID it's fine as I can use my Dad's but if it's the serial number I can't really take it in again. Just a yes or no answer please. Thanks guys 😀