Hi, Wirex.
Do I have to send my documents every time I order a new card (so 3 times for the 3 cards) or only 1 time? thanks.
Unless you are ordering the cards from different new accounts each time , you should only verify your documents once and the new cards will be created based on those documents each time.
If you don't know the procedure on documents verification then check their blog post :
https://blog.e-coin.io/how-why-to-verify-e-coin-debit-card-4a7e20d25f14#.12wwfq4f0