Over time and through experimentation, he developed different ways of defrauding banks, such as printing out his own copies of checks (such as payroll checks), depositing them, and encouraging banks to advance him cash on the basis of his account balances.
De-a lungul timpului, prin experimentare, el a dezvoltat diferite moduri de fraudare a băncilor, cum ar fi imprimarea propriilor sale aproape perfecte exemplare de control, cum ar fi cecurile de salariu, precum și determinarea băncilor de a-i avansa numerar pe baza soldurilor conturilor.