H4 EAD Card lost in USPS Delivery, later reapplied and not got RFE to prove it was lost

Hi Team, My Wife H4 EAD card lost in USPS delivery but checked with USPS and did not get any help. Reached out to USCIS and they suggested to reapply. We re-applied the EAD and now received RFE requesting for proof that the card was lost.

1) Can we go ahead and file police report now? and attach the document?

2) Shall we create one affidavit and mention all the action we took at that time? Reached out to USPS --> Contacted USIC --> reapplied again.

3) What other document we need?

Any suggestion would be appreciated! Thanks!
 
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