Typesetting errors are printing errors caused by the incorrect insertion of letters, numerals or decorative elements. When the error affects the denomination, it is often described as a denomination error. The error may occur throughout a sheet, at several sheet positions or on a single stamp position only.

Main types of typesetting error

• substitution of one letter or character for another;
• incorrect denomination, such as the 50/35 error on the 1913 Turul issue or the 600/800 error on the 1924 Harvester issue;
• missing letters, for example inscriptions such as “illér”, “fil ér” or “forin” on 1946 postage-due stamps;
• transposed letters, such as “fiéllr”;
• a letter inserted sideways or upside down;
• use of an incorrect typeface or letter size;
• incorrect insertion of spacing material, which may shift a denomination or other printed element.