This section provides details on the elusive Errors, Freaks and Oddities (EFOs) of the Scouting topical area. The foundation for this section is from the SOSSI Journal article series "Errors and Major Varieties in Scout Philately" by Sheldon S. Levy.
- Inverted Scout Stamps An Overview
- United States All EFO
- 1900 Cape of Good Hope Cracked Plate Variety, Reversed Negative, Watermark, Partial Imperfs, Double Image, Ball Flaw
- 1919, 1920 Siam Invert, Overprint and Missing Line
- 1932 Romania Imperf Pair
- 1934 Romania Color Switch
- 1937 Netherlands Date Error on Cachet
- 1938 Lithuania Broken Circle, Comma Varieties
- 1948 Philippines Imperf Pair, Shifted Color
- 1949 Japan Imperf Bottom
- 1950 Iran Shifted Center
- 1953 New Zealand Partial Imperf
- 1956 Egypt Number Inversion on Cachet
- 1957 Brazil Watermarked Paper Variety
- 1957 Philippines Date Error
- 1957 Nicaragua Date Error
- 1957 Dominican Republic Shifted Flag, Shifted, Double or Missing Surcharge, Invert
- 1957 Korea Misspelled Cancel
- 1957 Great Britain Registered Handstamp Cancel
- 1958 Syria Transposition
- 1960 Brazil Missing Color
- 1960 Canada Center Shift
- 1961 Philippines Top Line Shift
- 1961 Trinidad & Tobago - Inverted Watermark
- 1961 Togo Missing Color
- 1962 Haiti Missing Color, Double Overprint
- 1962 Japan Missing Color
- 1962 Paraguay Partial Imperfs
- 1962 Turkey Imperf Sheet
- 1962 Columbia Cancel Misspelling
- 1963 Swiss Print Variety
- 1964 Dubai Post Card Varieties
- 1968 Egypt Missing Date
- 1968 Indonesia Color and Perforation Shift
- 1970 Anguilla Reverse Apostrophe Variety
- 1971 Montserrat - Postcard
- 1973 Dominican Republic Perforation Shift
- 1973 Philippines Color Shifts
- 1974 Dahomey Double Overprint and Surcharge
- 1975 Sweden Postcard and Stamp Errors
- 1975 Togo Overprint Variety
- 1977 St Vincent Overprint Error
- 1982 Philippines Imperforate
- 1985 St. Vincent Overprint Errors
- 1985 Bangladesh Overprint Errors
- 1993 Mongolia S/S