The clerk shall examine the recall petition to ascertain whether or not it conforms to the requirements of this article. He shall complete this examination within ten days from the receipt thereof. In examining the signatures of the electors he may, if in doubt as to the genuineness of any of them, compare them with the signatures contained in the registry books used at the last preceding general election. If the clerk shall determine that the petition does not conform to the requirements of this article he shall return it to the agent who filed it, for the purpose of correction, which correction may be made and the petition again filed within ten days of its return by the clerk.