The security element having an authenticity information item for checking the correct combination of at least two carrier parts (3, 4, 5), wherein the security element comprises at least one first partial element having a first partial information item and a second partial element having a second partial information item, wherein the first partial element is assignable to a first carrier part and the second partial element is assignable to a second carrier part, and wherein the first partial element and the second partial element are movable from a starting position into a check position, in which the first partial element and the second partial element overlay one another, wherein the first partial information item and the second partial information item in the check position represent said authenticity information item, wherein the first partial information item forms a first part of the authenticity information item and the second partial information item forms a second part of the authenticity information item, and wherein the sum of the first and second parts of the authenticity information item produce the authenticity information item, wherein the security element comprises, in addition to the first partial element and the second partial element, a third partial element having a third partial information item, which third partial element is assignable to a third carrier part, which third partial element is movable with respect to the first partial element from a starting position into a check position in which the first partial element and the third partial element overlay one another, wherein the first partial information item and the third partial information item in the check position represent a further authenticity information item, wherein the first partial information item forms a first part of the further authenticity information item and the third partial information item forms a second part of the further authenticity information item, and wherein the sum of the first and second parts of the further authenticity information item produce the further authenticity information item, characterized in that the authenticity information item is at least one first image in the form of a portrait, the outline of a country, a national coat of arms, or a national flag and/or at least one first alphanumeric character, wherein the first partial information item represents a first part of the at least one first image or of the at least one first alphanumeric character, and wherein the second partial information item represents a second part of the at least one first image or of the at least one first alphanumeric character, and in that the further authenticity information item is at least one second image in the form of a portrait, the outline of a country, a national coat of arms, or a national flag and/or at least one second alphanumeric character, wherein the first partial information item represents a first part of the at least one second image or of the at least one second alphanumeric character, and wherein the third partial information item represents a second part of the at least one second image or of the at least one second alphanumeric character. wherein the security element comprises, in addition to the first partial element and the second partial element, a third partial element having a third partial information item, which third partial element is assignable to a third carrier part, which third partial element is movable with respect to the first partial element from a starting position into a check position in which the first partial element and the third partial element overlay one another, wherein the first partial information item and the third partial information item in the check position represent a further authenticity information item, wherein the first partial information item forms a first part of the further authenticity information item and the third partial information item forms a second part of the further authenticity information item, and wherein the sum of the first and second parts of the further authenticity information item produce the further authenticity information item, characterized in that the authenticity information item is at least one first image in the form of a portrait, the outline of a country, a national coat of arms, or a national flag and/or at least one first alphanumeric character, wherein the first partial information item represents a first part of the at least one first image or of the at least one first alphanumeric character, and wherein the second partial information item represents a second part of the at least one first image or of the at least one first alphanumeric character, and in that the further authenticity information item is at least one second image in the form of a portrait, the outline of a country, a national coat of arms, or a national flag and/or at least one second alphanumeric character, wherein the first partial information item represents a first part of the at least one second image or of the at least one second alphanumeric character, and wherein the third partial information item represents a second part of the at least one second image or of the at least one second alphanumeric character.