Amazon Warehouse Organic certificates

Hello,
I just opened an account with Amazon to start using FBA fulfillment in the future. Since I intend to sell organic goods I am in the middle of getting my organic certification with Soil Association. They asked me to provide organic certificates for all Amazon warehouses in UK the goods could end up in. Unfortunately the automatic assistant just told me what I have to do to get organic certification with Amazon but not where I find their organic warehouse certificates. Can anybody help me with this who already is organic certified and knows what to do? Thanks a lot.