Generally speaking, in the US, an opposing attorney does not owe you a duty that would give rise to a claim for legal malpractice. A law firm is tasked with the responsibility of determining who the right party or parties are which need to be sued.First of all, you can't sanction opposing counsel, only the Court can "sanction. " Next, you don't "have" the preponderance of evidence. The general rule is simple: Non-clients generally cannot sue lawyers who did not represent them. You must fill out the Application for a Pro Se Summons form and submit it to the clerk in the county where you are suing, along with payment of the court fee. Law Offices, P.C., specializes in the fields of personal injury, medical and legal malpractice, and police brutality. Legal malpractice cases are two cases in one. You must prove that your attorney exhibited negligence while handling your case. Professional negligence is the most commonly pleaded cause of action against an attorney in a legal malpractice lawsuit.