I received my labor certification and am handling I-140 myself.

First, prepare the paperwork carefully. Organize your supporting evidence by category to match each section of the form, so it’s easy for the reviewing officer to follow. If the evidence isn’t organized clearly and is hard to make sense of, it will take the officer longer to review and understand, which can slow the decision — and it could even lead to a denial. Also, always use the most recently updated version of the form. Please check the following carefully as you proceed:

1. Check only one visa category box
2. Answer every question
3. Where there’s nothing to answer, be sure to write “N/A” rather than leaving it blank
4. Don’t add unnecessary highlighting or markup
5. Confirm the company representative’s signature of consent is present
6. Fill in responses in black ink by typewriter, or type them on a computer and print in black and white
7. Make absolutely sure the petitioner (employer or self) has signed I-140
8. Attach the exact fee amount specified in the form instructions
9. Write a separate check for the fee for each individual application
10. If filing online, send all supporting documents separately to the address specified in the e-filing instructions

That’s everything.