I am filling the i-130, but do not know what to fill on the "Naturalization. Give certificate number and date and place of issuance" once I do not have this document anymore. I became natural of the United States during my teens - a long time ago. I am aware that I can get a copy from the USCIS, but it may take up to a whole year.
Can I use a copy of my passport instead? And what do I write on that field?
Has anyone gone through this process?
Thanks,

You can use copy of passport and you can also submitt the form used to replace the certificate as proof as to submit for the i-130, it has to be stamped by an immigration officer and a reciept for the payment attached to the form. . You don't have to wait until you actually get the replacement certificate to file.

p.s. don't be like me and go thru all the above and never actually file the form. i went to immigration they stamped the form, I paid the fee and they gave me a reciept that was stapled to the form, I belive the receipt has the naturalization number on it. and THEN TOLD ME THEY COULDN'T ACCEPT THE FORM FROM ME. I HAD TO GO OUTSIDE AND MAIL IT TO THE SAME BUILDING I WAS STANDING IN. Only in america.