Guide for applicants, Part 2: PCT procedure before the EPO (Euro-PCT Guide)

Where additional fees are paid under protest and the protest fee is duly paid, the protest will be referred to the review panel for a decision in first and last resort. If the review panel finds that the protest was entirely justified, the additional fees and the protest fee will be refunded. If the review panel finds that the protest was justified only in part, the corresponding additional fees will be refunded, but not the protest fee.