Abraham Rajchmann (born 24 September 1902 in Dziurków, Poland) was a Jewish Polish career criminal and revolutionary militant,[1][a] expert forger and engraver who worked for Soviet intelligence from 1934.

[2] Through his contact with Comintern official Léon Grossvogel, he was recruited into a Soviet espionage group initially in Belgium that was being run by Leopold Trepper, that would later be called the Red Orchestra ("Rote Kapelle") by the Abwehr, during the Nazi period.

[3] Rajchmann used a number of aliases to disguise his identity, including Adam Blanssi, Arthur Roussel, Katenmann, Fabrikant and Max.

[2] Rajchmann was a member of the Communist International (Comintern) Pass-Apparat,[4] an industrial scale identity document forging operation, that was started in Berlin in 1919–1920[5] and eventually had offices all over Europe.

For Rajchmann, whose entire family had been killed during the Invasion of Poland, in September–October 1939, it was welcome news, as it enabled him to strike back at the Germans.

[3] After advising his wife who was staying at her parents house at 32 Avenue Jean Volders in Saint-Gilles to flee to France, Rajchmann took a train with his father-in-law and brother-in-law out of Belgium.

[3] In August 1940 he was contacted by Trepper who ordered him to travel to Toulouse where he would meet Comintern agent and courier Malvina Gruber, who would escort him back to Brussels to continue to provide documentation support to the Soviet espionage group there.

[12] In April 1941 in Brussels, Rajchmann was met by Makarov who told him that point onwards he would be expected to take part in the fight against the Germans.

[13] In September or October 1941, Trepper ordered Rajchmann to join Soviet agent Anatoly Gurevich,[2] who operated from a safehouse located at 101 Rue des Atrébates in Brussels.

[15] Rajchmann contacted Chief Inspector Charles Mathieu of the Belgian Police Judiciaire des Parquets to obtain the list.

The Funkabwehr found the secret room that Rajchmann used to forge documents, that contained blank passports and inks.

[20] Trepper happened to be in Brussels at the time, found out and warned Gurevich of the raid, managing to evade arrest.

[22] Gurevich arranged travel documents with Rajchmann for Gurvich's wife Greta Barcza and his son, so they could flee Belgium.

Rajchmann suggest using the home of Chief Inspector Mathieu on 65 Avenue des Tilleuls in Brussels; the transfer was arranged in January 1942, via Bob Isbutzki.

[39] On the 26 July 1946, Rajchmann was arrested by Belgian police and tried by a Military tribunal who sentenced him to twelve years in prison for espionage.

[32] In 1960, a report was created by a NATO Special Committee that stated that Rajchmann was living at 32 Avenue Jean Voiders, St Gilles, Belgium.