Well, we are afraid there is no way around it, as accidents can unfortunately always happen. A security deposit in the amount of 850USD will have to be provided either by debit or credit card (VISA or Mastercard). The amount will only be blocked for 30 days and will be released automatically if everything is in order. Keep in mind that some banks don´t reflect the release as a return in "+850USD", but delete the "-850USD" from your online banking automatically.
Simply track the status of your deposit in your customer account.
A cash payment of the deposit, bank transfer in advance or deposit with Paypal or American Express is unfortunately not possible.