Where to get the Legal papers?

In most states you go to the local Family Law Court, and fill out the forms for an ex parte filing. Then you file it with the clerk of the Court, and they will tell you when you have an appearance before the judge.

You will have to arrange to serve papers on your ex, so that he (or she) gets notice of when they can appear to explain their side of the story.

Alimony/spousal support is usually decided at the time of the divorce settlement. So if you are divorced, you would have to have an awfully good reason to have it awarded later.