TITLE: GCN CIRCULAR NUMBER: 28332 SUBJECT: Fermi GBM trigger 620564765/200831463 is not a GRB DATE: 20/08/31 13:50:34 GMT FROM: Elisabetta Bissaldi at INFN,Bari E. Bissaldi (Politecnico and INFN Bari) reports on behalf of the Fermi GBM Team: "The Fermi Gamma-ray Burst Monitor (GBM) trigger 620564765/200831463 at 11:06:00.84 UT on 31 August 2020, tentatively classified as a GRB, is in fact not due to a GRB. This trigger is likely due to local particles."