1. Where the Member State of refund considers that it does not have all the relevant information on which to make a decision in respect of the whole or part of the refund application, it may request, by electronic means, additional information, in particular from the applicant or from the competent authorities of the Member State of establishment, within the four-month period referred to in Article 19(2). Where the additional information is requested from someone other than the applicant or a competent authority of a Member State, the request shall be made by electronic means only if such means are available to the recipient of the request.

If necessary, the Member State of refund may request further additional information.

The information requested in accordance with this paragraph may include the submission of the original or a copy of the relevant invoice or import document where the Member State of refund has reasonable doubts regarding the validity or accuracy of a particular claim. In that case, the thresholds mentioned in Article 10 shall not apply.

2. The Member State of refund shall be provided with the information requested under paragraph 1 within one month of the date on which the request reaches the person to whom it is addressed.