For those who would like to have the information in English:
Carded
The Carded stamp was used on documents that had been recorded by the ITS for its Central Name Index (CNI). This activity was referred to internally as “carding.” During the carding process, the names of all the people mentioned on a document were transferred to individual file cards. These cards noted the name of the person and the shelf mark of the document. ITS employees would then file the cards in the CNI. When a person was being traced, the employees would pull the card, which would tell them where to find the document with more information. Before the CNI was digitized in 1998/1999, around 50 million of these cards were created.
Crossing out the documents (red or yellow line)
A less obvious feature found on many documents from concentration camps is a line drawn across the card or form. These lines, usually drawn with a red colored pencil, can mean that the prisoner had died in the camp, had been transferred to another camp or had been released. Cards for prisoners who were no longer in a camp were often be crossed out like this so that the back side could continue to be used without causing any confusion about the two different names on the card. Other symbols are usually found on the cards of prisoners who died. There may be a stamp or handwritten note indicating the date of death, and a regular cross or straight-armed Balkenkreuz – with or without the date of death – may be clearly drawn or stamped on the card.
ITS Foto
The I.T.S. Foto stamp was used on documents that were photographed by US authorities in the early 1950s to preserve the information. This stamp therefore does not mean the Arolsen Archives have photographs of the respective person, as is often assumed.