When you say "under the table", do you mean unbeknown to the customer or the employer? The later will likely result in the employee being fired, fined and possi

When you say "under the table", do you mean unbeknown to the customer or the employer? The later will likely result in the employee being fired, fined and possible jailed. I would also suspect that a criminal do not file taxes for selling stolen data, so one can likely add tax fraud. If you know such people you should consider reporting it to the police.