Richer was shipped off to France to gain information on armaments production. She was provided with a new kind of security device, an invisible ink that was contained within a capsule the size of a grain of rice. Upon arrival, she disclosed the invisible ink to her French superiors and informed them that she was involved with Kron. She was given doctored information about armaments production and was sent back to Spain.

In Spain, she re-established her relationship with her lover. She also learned that he had been involved with Mata Hari, the notorious spy who was staying ater the same hotel as Richer. Threatening to break off her relationship with Kron, Richer was able to draw the lovestruck attache even deeper into her web, thus gaining access to even more secret information, which she passed back to the French, including revelations about submarine development.

Richer was sent across the globe on missions but eventually grew tired of the deception and the pressure. Eventauly she decided to return home to France but first confessed her duplicity to Baron Kron. After retiring from active service, Richer was generally ignred by the French government, based in part from unfavorable attention to her long-running relationship with the German attache. Eventually, however, her services were recognized and she was awarded the Legion of Honor medal in 1933.

Took part in the French resistence during World War II and died in 1982.