If your employer fails to pay you after starting your H-1B employment, it can pose challenges for future H-1B transfers. To address this:

• File a complaint with the U.S. Department of Labor's Wage and Hour Division.
• You can file online or by phone (search for "LCA complaint US Department of Labor").
• This complaint serves as evidence explaining the lack of pay stubs during future H-1B transfers.
• Employers must start paying when you're ready to work or within 30 days (if coming from outside the US) or 60 days (if already in the US), whichever is earlier.
• Filing a complaint may help you recover unpaid wages and protect your ability to transfer your H-1B in the future.

The ability to keep your NIW when changing employers depends on whether you continue to pursue the same endeavor that was the basis for your NIW approval. If you maintain the same type of work in the same field, even with a different employer, you likely can keep your NIW. However, if you change to a completely different field or type of work, you may need to start a new green card process. For certainty, it's advisable to consider filing a new green card application or NIW when changing employers.