You can get a certificate confirming the presence of the antibody titer to rabies virus in your pet blood serum in the following ways:
by Russian Post. You can pick up a letter with documents at the nearest post office of Russia.
Express delivery by courier (at the expense of the recipient). If necessary, the courier will deliver a package of documents at a convenient time for you at the specified address.
At a sample collection office or at a partner clinic in your city.