Semi-Postals are a "charity stamp" that adds an extra charge to benefit a non-postal cause.  The Scouting Movement in the beginning and today has greatly benefited by the issue of these stamps by countries.

A semi-postal stamp has 2 values associated with it; the first value is the postal value of the stamp.  The second value is the amount to be given to the charity/project for which the stamp was issued.  The values are typically represented on stamps as: 32 +8.  The cost of such a stamp is 40 cents, where 32 cents can be used for postage and 8 cents will be donated. (Exception: The US Breast Cancer semi-postal fee was invisible - the stamp did not indicate the combined sum of postage and contribution).

• New Zealand Health Stamps
• Classic Scout Stamps

• Switzerland Scout Stamp Booklets