Visa
Permission to enter and/or exit the territory of a country made in the form of a sticker, an insert, a stamp or a small sticker. A visa is placed on special pages of a travel document or it can be issued as a separate document.
a
b
c
Fig. 1. Poland:
a — visa in the form of a sticker issued in 2004. Paper substrate; b — the same. UV light; c — the same. IR light
a
b
Fig. 2. Turkey:
a — visa in the form of a small sticker. It is applied on visa pages of a travel document. Paper substrate; b — the same. UV light
Fig. 3. Lebanon. Visa in the form of an ink stamp on a visa page of a travel document
a
b
Fig. 4. USSR:
a — entry-exit visa in the form of an insert issued in 1992. Folded document. Paper substrate; b — the same. Page spread