All that is on your "card" is whatever you put on your time slips, your name, DOB if they know it, address (the last one they had when you left), whether you were baptized, date of baptism, whether you were of the other sheep, anointed, elder, MS, regular pioneer, phone number.
There is no record of your offenses or a summary of the BOE opinion of you.
After you leave, it is just a reminder of who they have to call on. Most elders do not like doing this; and the reports of many here who have not been called on prove that.
I read where one non-JW man got rid of JWs calling on him by inviting them in and then telling them he had been a JW and was now DF'd. He said they left very quickly and did not call on him again.
Blondie