Unfortunately, the MIA of Russia which provides the visa extension service for foreign students in Russia, has very strict deadlines, the latest term to apply documents to our office to extend visa is 25 working days before your visa expiration date. If you are arriving later than this, we recommend you to apply for a new invitation and get a fresh visa in your country, so that upon arrival you'll have enough time to collect and apply your documents for visa extension to our office.
In case you have already bought non-refundable tickets and missing the latest deadline for visa extension application in Russia, please contact our office by email: visa-registration@hse.ru