The second method
What a refused person does next, who is involved, and what the record says afterwards.
What Happens When It Will Not Read You
Every site needs a way for a refused person to start work and be paid. Most have one by accident, and it is whatever the supervisor did the first time.
The Keypad Code, and the Objection To It
A code can be shared, which is the whole argument against it. The argument is weaker than it sounds and the alternative it protects is worse.
The Supervisor Override
The most common fallback is the worst of the available options, and its real cost is paid by the supervisor, several times a week, in front of a queue.
The Paper Sheet at the Reader
Sometimes paper is the only thing left. It is the least designed artefact in the process and the one most likely to be read out in a dispute.
Who May Use It, and How Often
The fallback exists on every site and the rule governing it exists on almost none, which means it is governed by whatever each supervisor thinks is reasonable.
The Queue the Fallback Makes
A four per cent failure rate sounds small until it meets three hundred people arriving in ten minutes through one door. Then it is the shift change.
Testing the Fallback Before You Need It
The fallback is the part of the system that is never exercised until the morning it matters, which is the morning it turns out not to work.