Finding dates of filing for previous petitions

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I am now completing the I-129f for my fiancé. Question #11 asks for the dates of previous petitions for aliens. I sponsered my ex-wife for a green card at the Chicago office sometime between 1999 and 2002. I do not know the exact date, nor do I have other information like her Alien Registration Number that would make it easier to find this information using the G-639.

My questions are, 1) will the aproxiamte date of filing be sufficient for the I-129-f and, 2) if not will they do their own search to find the exact date? Thanks for your help.

[joeyjoey 1]

I am now completing the I-129f for my fiancé. Question #11 asks for the dates of previous petitions for aliens. I sponsered my ex-wife for a green card at the Chicago office sometime between 1999 and 2002. I do not know the exact date, nor do I have other information like her Alien Registration Number that would make it easier to find this information using the G-639.

My questions are, 1) will the aproxiamte date of filing be sufficient for the I-129-f and, 2) if not will they do their own search to find the exact date? Thanks for your help.

They will do their own search. So just list the dates to the best of your memory. Fill in what you can. If they have more questions, USCIS will send an RFE, at which time you can provide a more detailed explanation for them.