How To Write A Formal Letter To Attorney . Pursuant to {specific law} that states {state the law}, i would like to request {state your request}. If there is no case number or it is not known put the client's name here. Lawyer Letter Free Printable Documents from londonmedarb.com If your lawyer is ignoring you, it may be time to hire a. While this is your first option, if the informal complaint letter does not lead to the outcome you desire, you may have to file a formal complaint against your attorney. Generally, this is the best way to address an attorney if you've never spoken to them.