The communications handled by the customer service team related to COI requirements was handled extremely poorly to say the least. I called the customer service three times on different days and each time i was given ja different answer . 
1) The first time i was told that wayfair will handled communication directly with the building management .
2) The second time I was told , I need to send a sample COI , after that, 24 hrs before the delivery date , I will receive email from wayfair with completed COI which i need to forward to the building management .
3) The third time , a day before the delivery date , I was told , you wont receive any email, the COI will given to the building management directly by the delivery team.
On the day of delivery, when the delivery team contacted me for coordination and I asked for COI, they said they dont have it, when i called customer service and vented my frustration then they emailed me and i had to rush to building office to coordinate.