Ability to upload additional customs documentation

[ShopFS]

Hi,

Please consider developing the ability to upload additional customs documentation for International shipments that would be included in the paperless/electronic transfer of customs documents. 

We ship seeds/plants and nearly all shipments require a Phytosanitary Certificate in addition to the Commercial Invoice. FedEx and DHL have the ability to do this if shipping directly on their websites, but ShipStation customer service agents have confirmed it’s not possible at this time through SS. Without this ability to electronically upload additional documents, we have to individually print copies of the Phyto certificate and Commercial Invoice to hand the courier at pickup to then be manually scanned in on their side. Thus negating the paperless/electronic doc feature. It’s doable for a few shipments at a time but onerous for hundreds!

Thank you for your consideration!