Withdrawal of the supplementary search request 

ApplicantsAn applicant may withdraw histheir request for supplementary international search by addressing a notice of withdrawal to either the IB or the authority specified for the supplementary search, and may do so at any time before transmittal by the SISA of the supplementary international search report or of the declaration that no such report will be established. The EPO as SISA will mark the notice of withdrawal with the date on which it was received and promptly transmit it to the IB. For information on the refund of the supplementary international search fee by the EPO as SISA, see GL/PCT‑EPO A‑III, 9.4.

Rule 90bis.3bis
PCT AI section 520

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