Duties of the Account Servicing Payment Service Provider

(1) An account servicing payment service provider must, on the request of a payment service provider issuing card-based payment instruments (card-issuing payment service provider), confirm without delay whether the amount of money necessary for the execution of a card-based payment transaction is available on the payer's payment account, where 1. the payer's payment account is accessible online at the time of the request, 2. the payer has given the account servicing payment service provider explicit consent to comply with requests from a specific card-issuing payment service provider for confirmation that the amount corresponding to a specific card-based payment transaction is available on the payer's payment account, and 3. the consent under no. 2 was given before the first such request is received.
(2) The account servicing payment service provider's answer to the request may not include any communication of the payer's account balance and consists exclusively of "yes" or "no".
(3) The confirmation under subsection (1) does not entitle the account servicing payment service provider to block an amount of money on the payer's payment account.