My sister has changed all of our parents accounts, before my parents are deceased. My parents are of sound mind, but she is trying to convince my father to leave me out of everything, just because I'm on SSI. I help my parents quite often, but when she comes around, my Dad starts acting aggressive towards me. He isolates my Mother,and is verbally abusive towards her, and they argue a lot. She has called me, just to have someone to talk to when he leaves her alone. She says she doesn't know why my Sister has her name on all of their accounts. My Dad has been changing too many things around lately,and my Sister has talked him into a POA when my Uncle died. Now, she has opened accounts in my Parents names,just so she can transfer their assets later. I want to know if I should consult an attorney, before it's too late for me, and my children. My Father has started to despise me,as my Sister has been telling him lies about me. She even told me some of these things,as I couldn't believe how delusional she has become.

I am having a lot of trouble with my Sister, and my Dad because of my disability.
The only problem is that they talk about me in public,and while I'm there,just like I'm not there. My Father absoultley despises anyone who is "On the Doles" as he puts it. He says "If your Daughter can get a job, why can't you"? Or "How much money do you owe them anyway"? (meaning the government) He picks arguments with me so much about this,I don't go to visit him & my Mother too often now. I used to go every weekend, and help my Mother around the house, and my Dad to do some other things he needed help with. But when my Sister puts her two cents in,and she'll tell my Dad "Don't give her any money, cause they'll just take it away(Meaning the gov,again) She's even trying to get my Dad to disinherit me. She's very self-centered, to say the least. She tells me "Oh, you don't have good luck with lawyers, do You "? Well, I think I'm going to need one, and soon!

I don't understand your question at all. Are you considering legal action? For what? Against whom? Where are you? Please provide some additional information and we can try to help.

I would like to know if you have to wait until someone passes away to hire an attorney? Especially when you are having trouble with a family member,and you know they are trying to take over your Parents assets. My Sister has her name on all of our Parents accounts now, and my Mother was never consulted about this. A lot of their accounts have been changed, and if someone were to inquire I am positive that they would find some theft of assets.
My father has transferred my mothers assets,while she was sick in the hospital. He told me that he only had medical POA for her,but not Legal. I know this ,as he told me himself and was asking me to look up "How to get Legal POA" while my Mother was hospitalized. My Sister tried to get me to tell her where my Mom's legal papers were,but I wouldn't tell her. My Mom asked me not to tell anyone. As long as my Mother is alive,I am going to honor her wishes,period. And no one can change that. While my Mom was hospitalized,I was told that I "needed a code" to get an update on her medical condition. I was the only one in my Family that didn't have it,and no one would give it to me. As far as I knew, My Dad was going to let my Brother in law(next sister) handle his affairs. I had no objection to this,and all of a sudden everything is different.Now, my older Sister has taken over!
My Parents have always been against "wills". They always told us that everything goes to the Family equally. Why, all of a sudden does my Sister think she has a right to eveyone's belongings. I had a best friend pass over 5 yrs ago,and I have given his belongings to his Family. The few things they didn't want, I gave something to each of his closest friends. I kept his favorite hat, and it hangs in a special place on my wall. I have wore it once. My Sister doesn't care about anything my Parents own,she just wants to sell the stuff before they're even gone. It's very sad to think someone could be this way. When I look at things my Parents show me,it brings back memories from my childhood. I would like to have these memories around me for a while. That's the person I am. My Sister has even abandoned my Mother at the hospital, took the cell phone and garage door opener from her, and told her to "Take a taxi home". Her and my Father get into shouting matches quite frequently. When my Dad yells at me,all I do is ask him to please not get upset with me. I never yell at him, out of respect. Sorry if I'm going on and on, but I'm not sure what to do about the situation at hand.

The first thing you need to do is call one of the numbers for elder abuse (in your case, financial) and get some advice as to how to proceed. Here's the national site that includes a general number as well as numbers for the various states -- NCEA Home (http://www.ncea.aoa.gov/ncearoot/Main_Site/index.aspx).

Not having a will does not guarantee the estate will be divided evenly among the children (as you've noticed) or if certain children receive certain items. A will would do that. Of course, there has to be something left to divide up.

Out of, you seem to be posting a lof different posts around the same issue. I am going to ask that all of your posts be merged, so please don't ask any more questions thinking you are not getting answers. All of your posts are confusing one issue, probably why you are not getting any answers. Please be patient, not all experts here are on at the same time; we volunteer our time here. You could also make your posts easier to read by breaking down into paragraphs.

Tick

Yes, contact an attorney and see what they advise you to do since they are both living. What excuse other than she wants to control their assets now vs wait for them to die does she give them or you?

Being on disability is NOT a reason for an attorney NOT to take you seriously. Your father and sister are trying to beat you down mentally here.

...
My Parents have always been against "wills". They always told us that everything goes to the Family equally. ...

That is probably because they misunderstand what a will would accomplish. A will would aswer many questions that intestacy statutes do poorly or not at all.

But it doesn't matter. Apparently your parents are giving all of their property to your sister before they die. If that's what they want, so be it.

The best way to get a lawyer to take you seriously is to offer him a piece of paper, with a number, followed by lots and lots of zeros, and your signature on the bottom.

(a check)

I have merged all of your sister stealing your parents money so you won't get any posts.

First you are always free to hire an attorney, but at this point they can't do anything, it is not your money and you are not entitled to anything unless your parents want you to have it.

Your sister can talk them out of every penny if she wants to. And if the accounts or property is set up with her as owner depending on how they are set up, she will get every penny.

If she talks them into not like you, they can decide not to leave you a penny,

It is not your money at this point, and they are not stealing from you, if your parents want to investigate her for stealing they can, you have nothing to do with this.
Get over it, or talk to your parents about it.