fidelity SDE background check

Fidelity messaged me this morning and said: "Can you please provide the following information required to complete your background investigation with Fidelity Investments? Please provide any details and documents regarding your reason for leaving Amazon." I essentially got PIPED and took the severance instead of fighting it, but don't know what to say, also don't have access to the severance documents anymore I didn't save them :/ #fidelity#amazon#backgroundcheck #tech