This is a four part question: 1. One of our religious workers has left our employment and has stayed in the United States to find new employment (new sponsor) for a new visa. We had sponsored an R-1 visa for him. There are about four more years remaining on his current R-1 visa. Which form should we submit to the USCIS to inform them of his leaving? 2. Once we inform the USCIS, are we still responsible for this person or his actions if at all anything goes wrong? 3. Are we responsible if this person is unable to find a new sponsor (doesn't apply for a new visa for any reason) and lives & works in the United States illegally? 4. Is this situation a cause for concern in regards to our credibility with the USCIS? Kindly address all the four parts. Thank you very much.