What two ways could person in the north avoid the draft in the civil war?

During the Civil War, individuals in the North could avoid the draft by paying a commutation fee, which allowed them to buy their way out of service for $300. Alternatively, they could find a substitute to serve in their place, effectively hiring someone else to fulfill their military obligation. These options were often criticized as favoring the wealthy, as they could afford to avoid conscription while poorer individuals had to serve.