File a complaint with the federal agency you  believe to be appropriate within 180 days of the alleged discrimination. Refer to the list on page 65 to determine which federal agency may be appropriate for your situation. To file a complaint, write a letter describing the discrimination that you believe occurred. There is no complaint form for ADA complaints. File a complaint with the Department of Justice,  which will refer your complaint to the appropriate agency. File a private suit against the public entity.  the Massachusetts Office on Disability to seek guidance on pursuing your complaint with the Massachusetts Commission Against Discrimination. Alternative means of dispute resolution, such as  settlement negotiations, conciliation, mediation, and arbitration, are encouraged. If your complaint addresses violations of Title III of the ADA (public accommodations and commercial facilities), you can: file a complaint with the U.S. Department of  Justice, who may investigate and could commence a civil action in the appropriate U.S. district court if the case involves a "pattern or practice of
 File a complaint with the federal agency you believe to be appropriate within 180 days of the alleged discrimination. Refer to the list on page 65 to determine which federal agency may be appropriate for your situation. To file a complaint, write a letter describing the discrimination that you believe occurred. There is no complaint form for ADA complaints.  File a complaint with the Department of Justice, which will refer your complaint to the appropriate agency.  File a private suit against the public entity. the Massachusetts Office on Disability to seek guidance on pursuing your complaint with the Massachusetts Commission Against Discrimination.  Alternative means of dispute resolution, such as settlement negotiations, conciliation, mediation, and arbitration, are encouraged. If your complaint addresses violations of Title III of the ADA (public accommodations and commercial facilities), you can:  file a complaint with the U.S. Department of Justice, who may investigate and could commence a civil action in the appropriate U.S. district court if the case involves a "pattern or practice of