My old passport got lost last month, including my Non-immigrant B visa I got in 2016 plus its extensions since.
A new passport is on its way now, together with a letter from the embassy about the loss of my old passport, but what about my visa? I still have copies of the old one plus the latest extension, but will that be all I need at immigration?
TLDR : Answer Summary
The user lost their old passport, which contained a Non-immigrant B visa and its extensions, and is inquiring about the process regarding their visa given the loss and the issuance of a new passport.