Legal malpractice litigation is unique.  While the simple fact is that this branch of the law is written by attorneys, is utilized to litigate against attorneys, is judged upon by attorneys, the more complex story is that there are a number of unique rules.  One is that a criminal defendant may not sue his attorney absent "actual innocence."  There are no lawsuits

Over the years, the rules of service of process have changed.  Once, long ago, a case was commenced when defendants were served with a summons and complaint and an index number was purchased only when necessary.  Later, in 1992 a commencement by index number rule started, and questions of service then arose.  Under CPLR 306-b