Will a signed by both him and I (both parties) not notarized, printed on a job invoice agreement, hold up in a PA court?

Yes, even an oral agreement is enforceable, but given you have an invoice, you are in a better position that simply having a "he said, she said"...

How do I stop this from happening again?

Consult a lawyer on child custody. Not sure you have used polyamory as it seems to be defined in popular culture, having more than one sexual...

Legal rules governing fortune 500 company reduction of workforce layoff/no fault of employee termination laws in the USA .

This is a case where workers compensation, retaliation for having a workers' compensation case, a case under the Americans with Disabilities Act,...

The first question is whether you have a contract with the Employer, either individually or are a union member subject to a contract, called a...

My question is can a employer give an employee all three at once or should they have come as they happened.

Yes. How they determine separate instances is within their discretion as management has wide discretion in the workplace if you, like many...

Fired for being pregnant. What can I do?

You have a case for pregnancy discrimination. Such timing would be important in proving your case. We have an office in Berks County on...

Can I get unemployment after being out on medical leave and then not returning to the job when dr releases me to return to work?

I they don't want you back and you are on restrictions but can work, you could get unemployment. Unemployment is for people who lose their job...

Reduction in workforce jobs and/or personnel elimination rules and/or violation & possible management related retaliation rules

First things first. If you are on restrictions, they have to reinstate your workers' compensation. You have a good workers' comp case for...

Not advisable legally. Signing and dating should occur at the same time in almost any circumstance. There is not enough information here to know...

Should I take their "deal" for the sake of my family's financial well-being, or do I have a legitimate case I should pursue?

Hard to evaluate something so long ago without more specifics. You should call a good employment lawyer to evaluate your situation. You might...