Make a copy of your Naturalization Certificate. Send the copy - NOT the original - to the National Visa Center, 32 Rochester Avenue, Portsmouth NH 03801-2909, with a letter containing the beneficiary name and case number of the petition you want to upgrade. The National Visa Center will send the beneficiary any additional forms and information that may be required.

Write to The National Visa Center, 32 Rochester Avenue, Portsmouth NH 03801-2909, or fax your new address to 603-334-0759. Be sure to include your case number or your USCIS receipt number.

Each country has its own requirements for obtaining police certificates or clearances. Specific information is available from the U.S. Consulate your case.

If you are inside the U.S., file Form I-90. Detailed instructions are on the form.

A person who is automatically granted another citizenship does not risk losing U.S. citizenship. However, a person who acquires a foreign citizenship by applying for it may lose U.S. citizenship. In order to lose U.S. citizenship, the law requires that the person must apply for the foreign citizenship voluntarily, by free choice, and with the intention to give up U.S. citizenship. The U.S. Government does not encourage dual nationality because of the problems it may cause. Claims of other countries upon dual-national U.S. citizens can place them in situations where their obligations to one country are in conflict with the laws of the other. In addition, their dual nationality may hamper U.S. efforts to provide protection to its citizens when they are abroad, especially in the country of their other nationality.

U.S. employers must check to make sure all employees, regardless of citizenship or national origin, are allowed to work in the United States. If you are not a citizen or a lawful permanent resident (immigrant), you may need to apply for a work permit, formally called an "Employment Authorization Document" (EAD), to prove you may work in the United States.