This is a broad question. Let us address it in a logical way: Nonimmigrants: Extension of Status situations: An individual can travel when the INS is processing a petition for extension of status, provided the individual has an unexpired visa to travel and return to the United States. Change of Status situations: Travel is prohibited [...]

In SEVP's OPT 2010 Policy Guidance, Section 7.2.1 (p. 17-18) states, in part: “Unpaid employment. A student may work as a volunteer or unpaid intern, where this practice does not violate any labor laws. The work must be at least 20 hours per week for a student on post-completion OPT. A student must be able [...]

USCIS FAQ on how to use the Premium Processing Service

Yes, you can, but we advise strongly against it. Postponing your fingerprinting appointment could delay it for an indeterminate period of time and lead to an overall delay in processing.

Generally, there is no requirement that you wait to switch employers after you become a permanent resident. However, the USCIS may make this an issue when you apply for Naturalization if they suspect that the employment was purely meant to obtain your Green Card.

I-94 is taken when you leave the shores of the U.S. You must surrender it when you board the international flight.

An uncollected I-94, Arrival Departure Card becomes the responsibility of the visitor. Not having it entered, or properly recorded in the Customs and Border Patrol System could result in secondary inspection, delays and potential denial of entry during a subsequent visit. At a minimum, the card and information should be sent to: ACS – CBP [...]

Here is an extract from the process to surrender I-94 documents that are not taken at the POE. The bottom line is that in today's world of increased enforcement and increased scrutiny of applicants for admission or adjustment of status, it has become incumbent upon on those whose I-94s were not surrendered upon departure to [...]

You have several options: A non immigrant visa to work in the US under NAFTA as a professional A non-immigrant visa to work in the US in a specialty occupation as an H-1B professional. [Minimum is a bachelor's degree in the field of endeavor] A non-immigrant student visa which will allow her to work 20 [...]

Most visa categories currently available for work in the United States are geared to assist U.S. businesses hire international workers. Freelancing may not be possible unless you are a journalist being sent here by a foreign publication [again, in a very limited sense]. However, if you have outstanding ability in your field of endeavor you [...]