I sent someone a letter and it came back as return to sender with (Par) on it what does this mean

It means that there is no forwarding address.

Can a seller back out from a deal after I signed the escrow documents

If the documents were signed and escrow closed then you own the property and the seller does not have any rights. If the escrow did not close you...

Is it possible to sue a motel for false advertisement?

It seems that you and the management are not compatible and you always have the right to leave and find a new place to stay.

Like every other trademark, if you are using a mark that is confusingly similar to consumers of another mark, then you may have problems. Merely...

Can you place a city name like "Boston" on a product and also place "Pro Baseball" on it as well?

There are many hurdles you will have to cross to create a product using the word, "Boston" and using the words, "Pro" anything without first...

Can you file suit for financial abuse?

More information is required such as the relationship between the parties, what was done, why you believe there is abuse, etc.

Do I have a case against my cousin if we went into businsess together and she changed the locks

There is so much more information that is needed before someone can advise you. See a local business attorney and go over the facts with him/her.

Harrasment

Clearly you must really like where you live or you should move to somewhere where you will find peace. As to your current situation, you need to...

What can I do if someone keeps trespassing on the Property?

You need to move if you do not like what is going on where you live.

Can I sue someone who told lies about me at work?

Move on and do not let this bother you as it will cost you more in time, energy and emotion than you could possible recover.