Back of the book issues

Back of the book issues is slang for those issues found at the end of listings in stamp catalogs. For Scott catalog users, this would also include semipostals and airmails while in other catalogs, those are included in the "normal" listings. We have chosen to follow the latter system.

So for our purposes, "back of the book" includes but is not limited to the following:
 * Avis de réception, or Acknowledgement of receipt stamps
 * Express stamps
 * Franchise stamps, free stamps provided to charitable organizations, etc.
 * Military stamps
 * Newspaper stamps
 * Occupation stamps
 * Official stamps
 * Parcel post stamps
 * stamps for post offices abroad
 * Postage due stamps
 * Postal-fiscals, revenues authorized for use as postage.
 * Postal tax stamps
 * Postal tax postage due stamps
 * Regional issues
 * Registration stamps. See: Registered mail
 * Special delivery stamps

A number of countries have had these issues grouped into a separate article in Stamp Encyclopedia. Also for some countries, the above separate categories have articles large enough to deserve separate treatment as well. A partial list follows. Otherwise, see the country article.
 * Belgian back of the book issues
 * Finland back of the book issues
 * Italian back of the book issues
 * Mexican back of the book issues
 * Montenegro back of the book issues
 * Romanian back of the book issues
 * Swiss back of the book issues

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