Before visiting a field office, it’s useful to check if the information you need is available online. In terms of information, the field offices only supplement the information that’s already available on the USCIS website.
For example, if you’re interested in learning about your immigration options, you can do so online. The tool asks for your current status (green card holder, employer, etc.) and what you want to achieve to suggest immigration options. If you have filed a case, you can check the status or ask a question about your case online as well.
The USCIS also has some visiting requirements and information you should follow: It’s necessary to make appointments. The office work hours may change because of weather or other reasons, so check the agency’s site for updates before visiting. You’re not allowed to record or bring a firearm, knife, pepper spray, or ammo.