While firepay discontinued services to the US and Canada, they are still a excellent payment funding solution in many other countries. Like all webwallets the online application is pretty simple and bank verification is safe. You only need a bank account so the Firepay can debit your account by a EFT process.
They will give you instant credit to fund online casinos, and debit your bank the following business day. There is many fantastic solutions for funding online casinos and many do still accept credit cards from US players.
If you are having issues depositing you can always play at free play online casinos which will give you a bonus with no deposit required. Keep your winnings.