Superjk’s experience is most concerning, so I looked at my copy of the I-797 Approval that my employer received, and this is what is stated on the front:
“The above petition and extension of stay have been approved. The status of the named foreign worker(s) in this classification is valid as indicated above. The foreign worker(s) can work for the petitioner, but only as detailed in the petition and for the period authorized. Any change in employment requires a new petition. Since this employment authorization stems from the filing of this petition, separate employment authorization documentation is not required. Please contact the IRS with any questions about tax withholding.
The petitioner should keep the upper portion of this notice. The lower portion should be given to the worker. He or she should keep the right part with his or her Form I-94, Arrival-Departure Record. This part plus the I-94 should be turned in when departing the U. S. if he or she will not be returning in the classification during the above validity period. The left part is for his or her records. He or she should present it, along with any other required documentation, when applying for reentry as a TN at a port of entry or pre-flight inspection station.
The approval of this visa petition does not in itself grant any immigration status and does not guarantee that the alien beneficiary will subsequently be found to be eligible for a visa, for admission to the United States, or for an extension, change, or adjustment of status.
THIS FORM IS NOT A VISA NOR MAY IT BE USED IN PLACE OF A VISA.”
The second paragraph would certainly indicate that it is acceptable to detach the I-94 from the I-797, in fact the employer is instructed to do so; however, the 3rd paragraph is quite confusing. Are we to go to the border after we receive approval, only to have our petition revaluated again? Does this mean that if we haven’t obtained a TN from the CBP that the one attached to the I-797 is meaningless, and that anyone who finds themselves in this situation is out of status?