Hoechst har ligeledes peget på, at selskabet fremlagde skriftlige beviser for Kommissionen den 19. marts 1999, skønt dets ansatte endnu risikerede at blive strafforfulgt i USA, og skønt det i samarbejdsmeddelelsen af 1996 kun kræves, at der fremlægges bevis for kartellets eksistens, hvilket Hoechst gjorde allerede den 29. oktober 1998.
Hoechst also observes that it provided the Commission with documentary evidence on 19 March 1999, even though its personnel still faced the risk of criminal proceedings in the United States and though the 1996 Leniency Notice required only evidence of the existence of the cartel, which Hoechst provided as early as 29 October 1998.