As Per the Foreign Affairs Manual an H-1B beneficiary with a visa in their passport issued in the name of their old employer can continue to use the old employer’s visa after changing employers. This can be done until the date on the visa expires. One is required to carry a copy of the receipt notice of the new employer’s timely filed petition (if the new employer’s petition is pending) and present it to CBP when entering the country along with a copy of the old employer’s visa and approved petition. If the new employer’s petition has been approved, the approval notice of the new employer’s petition should be presented along with the old employer’s visa.
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