1. Where a payment transaction is initiated by or through the payee in the context of a card-based payment transaction, an account-to-account based transaction or a credit transfer and the exact future amount is not known at the moment when the payer authorizes the execution of the payment transaction, the payer's payment service provider may only block funds on the payer's payment account if the payer has given his or her permission to that precise amount of funds to be blocked.
2. The amount of the funds blocked by the payer's payment service provider shall be in proportion with the amount of the payment transaction which can reasonably be expected by the payer.
3. The payee shall inform its payment service provider of the exact amount of the payment transaction immediately after delivery of the service or goods to the payer.
4. The payer's payment service provider shall release the funds blocked on the payer's payment account immediately after receipt of the information about the ex
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