I did not receive my $300 check yet. I bought my Samsung Galaxy S8+ on Dec 23, 2017 from Costco BridgeWater, NJ , Kiosk#322.
www.mypromochoice.com online confirmation web page shows that they have mailed me the check, while I never any check. Confirmation Page does not include my Name and email address also, therefore I do not know how can they write a check to an unknown person.

Retailer: Costco
Kiosk #: 322
Purchase Date: 12/14/2017

Carrier: Verizon
Rebate Amount: $300.00

-Syed