Using Bitcoin / Bitcoin Cash / Ethereum / Litecoin

Using Amazon.com vouchers (gift card)

1. Buy an electronic giftcard at amazon.com
Note: you need to use our email (bookfi.donate@gmail.com) as "Recipient E-mail" in the form.
2. Email the amazon.com giftcard (or the voucher code itself) to bookfi.donate@gmail.com (Make sure to include your login email.)

Example: