If i inform someone about my sisters abusive history at home, will it affect her court hearing?

Telling the truth is a good idea. Honesty is the best policy.

So my friend is 17 can my dad be his legal guardian

A 17 year old can petition a court for emancipation. Non-parental custody is less likely, but sometimes possible.

I legally changed my name, but my mother maiden name was misspelled?

It seems unlikely that would be any problem.

Pro-Se Plaintiff, civil suit and Defendant has threatened harm to key witnesses in social media posts. How do I proceed?

Intimidating a witness is a Class B felony. You should report it to the police, tell the judge, and ask for protective orders. ...

A RECOURSE OF A CONVICTED MURDER HAS AFTER BEING SENTENCES BY THE SUPREME COURT?

Here's some free counsel: the harder you work, the luckier you get. Trial courts impose sentences. Typically, the last chance to commute a...

Snohomish County Wa. how long does opposing counsel have to produce answer to discovery questions?

You should discuss the process with your own attorney. CR 37 governs the process when a party fails to make discovery. ...

How do I get evidence that wasn't served on me, but was admitted and used against me in arbitration?

If you have made a request for a trial de novo (MAR 7.1) you can make a request for production of documents per CR 34.

I need to sue my landlord for more then the allowed amount at small claims court, what court do I sue him in?

District Court might be for you. http://app.leg.wa.gov/RCW/default.aspx?cite=3.66.020

How do I ask the court to remove part of a declaration that contains a lie and unproven statements?

Maybe you should make a motion to have the court seal the documents. GR 15 governs :...

Send a letter back and keep a copy. Be polite and civil, but don't send money if you don't owe them any.