New York, NY securities attorney Jenice L. Malecki talks about the process for filing a lawsuit related to forgery, conversion, or theft. She mentions that a lawsuit for forgery, conversion, or theft largely depends on where the incident occurred. If it took place at a brokerage firm, a FINRA arbitration can typically be pursued. If it occurred at an investment advisory firm, arbitration is also likely, as most investment advisory contracts include a specified arbitration forum. However, if neither of these entities is involved, the matter would generally proceed in court—unless the custodian of the property required the signing of a contract that designates an alternative dispute resolution forum.