When you complete and sign immigration forms, you must verify that it is the current and valid form. The immigration service updates forms on a regular basis. Therefore a simple way to confirm the validity of the form is to print the form directly from the USCIS website right before sending the completed and signed form. You may also verify whether your form is the valid form by checking forms updated at https://www.uscis.gov/forms-updates
When you view form updates at the link above, you’ll get a list of updated forms from the most recent down. This is a simple mistake to avoid. Submitting expired forms will lead to the rejection of your application and a delay in the application processing, This delay can be devastating if you are within the constraints of a tight deadline.
NOTE: As always this is for informational purposes only and is not legal advice. Consult an attorney for advice regarding your particular circumstances.