How do I file a complaint? Your complaint must be in writing.To read about the State Bar of Texas complaint process, click here. If you wish to submit a complaint via mail, please click here to download the form. If you need any more information about how to file a complaint, you may call the Office of Bar Counsel at (410) 514-7051. Gather your documents. I am terrified of having a bar complaint filed against me. Please note: this number is not a referral service to find a lawyer or make a complaint against a lawyer. A portion of the fee also is deposited in the Clients' Protection Fund of the Bar of Maryland. Yes you can file a complaint against the opposing attorney.