After the invoice containing all of the details for the bank transfer is sent with the delivery, the invoice amount is to be transferred to the account listed therein. Escrow services or payment service providers handle the payment between the provider and the customer. The escrow service/payment service provider forwards the customer's payment to the provider. Further information can be found on the website of the relevant escrow service/payment service provider. In case of an individual agreement, the invoice amount can be paid in cash. In case of Bitcoin, the amount in Bitcoin is defined by the provider and has to to be paid within 6 hours to the Bitcoin address specified by the provider.