If a offer of judgment has the attorney listed as, "for the Plaintiff" on the top but you are the plaintiff is it valid in court

You want to check with an attorney to determine if it's a good offer. Most give free consultations.

Don't ever bank on getting something thrown out based on a thing like that. An offer of judgment can ONLY be made by the defendant. If a defendant makes an offer of judgment, and then you are awarded less than the amount of that offer at trial, the defendant can recover his/her fees from you. I don't see a judge saying "you don't get your fees because you listed yourself as 'for the plaintiff' on this document." There is a myth out there than any typo will get your charges dismissed or an issue decided in your favor. Don't believe it.