765 ILCS 5/37
All affidavits required to be made and produced under the foregoing section, may be made in any county in this state, before any officer authorized by the laws of this state to administer oaths and affirmations, and may also be made out of this state, before any judge, clerk of a court, notary public, or commissioner appointed under the laws of the state of Illinois to take acknowledgments of deeds and administer oaths and affirmations, and certified to by the said officer, under his seal of office, if such officer have an official seal; but if taken and certified by any officer who does not require or use an official seal, the certificate of the proper clerk or other officer of the official character of the person certifying to such oath or affirmation shall also be produced with such affidavit and certificate.
765 ILCS 5/37