Contact
One address, read by a person, usually answered within a couple of days.
[email protected]
Nothing is sold here, so there is no order to quote — the refunds page explains.
If you are writing to tell us a card is wrong, that is the most useful email this site gets. Say which card and what you saw happen instead. Corrections land free at every download link and are logged in the changelog.
If you are a Japanese speaker willing to check register on a set of cards, please say so — that is the work standing between the current drafts and a finished product, and it is described on how cards are checked.