You do need a covering letter for mailing passports
Yes. You need to send a covering letter with the FILE NO.
I kept a self-addressed (stamped $14.40 postage) express mail envelope.
As for acknolegment, NY won't send you anything. If you see your docs. granted and reached NY office, just mail original passports, (also indian pp for invalidation) and they will issue visa sticker as well as OCI documents (I would not call that as OCI passport as it is not a legal recognized passport).
Hope this helps.
Yes. You need to send a covering letter with the FILE NO.
I kept a self-addressed (stamped $14.40 postage) express mail envelope.
As for acknolegment, NY won't send you anything. If you see your docs. granted and reached NY office, just mail original passports, (also indian pp for invalidation) and they will issue visa sticker as well as OCI documents (I would not call that as OCI passport as it is not a legal recognized passport).
Hope this helps.