My Mon Filed A Lawsuit In My Name Without My Consent

Location: Washington

Sorry if i don’t explain this well. Never been in this situation and don’t understand legal stuff. So today my dad got a letter addressed to my mom. He threw it away before i could read it but said she was trying to file a lawsuit in my name for money. That i shouldn’t worry about it because she has no legal grounds. But obviously i worried about it and went dumpster diving at 6 am. So i looked it up and it is from a real law firm. It was addressed to my mom but said something about how this was litigation on behalf of me. It didn’t say exactly what the lawsuit was, but it had something to do with social media. It was by meta firm i think? And said something about me filing damages against the social media app, but didn’t say which one. What concerned me was that they needed all of my info. My medical records, employment, zip code, phone number, mental health records of me and my family, school records, and more. Literally everything about me and my family. It said she couldn’t sign the signature unless i was a minor or dead. I am neither. So im assuming she was just gonna forge my signature. She has impersonated my dads identity before by stealing his checks and cashing it in his name. So i wouldn’t put it past her. I do not talk to my mom as she is an abusive drug addict. I do NOT want her to have any of my medical info. She hasn’t been in my life in years. If she had signed my name and sent in the permission forms would she have been granted all of my records? Is filing a lawsuit without someones consent illegal? I definitely don’t want to be involved with whatever this is. I think she just wants money from a potential win. Apparently its class action, where i think its a bunch of people suing a company. Her being able to do this in the first place and my personal info possibly getting leaked has me worried. Is this illegal in some way and can i do anything about this? There was a number of an assistant, im not sure if i should call and explain the situation to her or ask to be taken off.