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IWR6843ISK-ODS: Replacement RF-Entwicklungstools

Part Number: IWR6843ISK-ODS
we have ordered the above-mentioned item at Mouser.
After thr delivery we found that the device "RF development tools IWR6843ISK ODS REVISION Mouser No.:595-IWR6843ISK-ODS" has the following defect: The device has scratches on one side and a kind of abrasion / erosion on the other (pictures in the appendix). Above all, the "abrasion / erosion" traces in picture_2 can be bad, as this is right next to / on the radar antennas.
We want to send the item back an get a
replacement delivery
Please let as know how to proceed in this case.  
<edited my moderator on Jun 14th 20211>