The petition itself will not die, don't worry! You now need to find another sponsor to "step into the shoes" of the original petitioner for affidavit of support purposes. Hopefully that can be another family member, if not, just about anyone who meets the affidavit of support's financial requirements.
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The petition does not necessarily die when the petitioner does. Find someone to take over.
Gunda J. Brost Brost Law Office This advice does not form an attorney-client relationship and is merely informative. It should not by itself be relied upon to address a legal concern.