I got deniel for i-130 petion for my sister and they said i can appeal.but what is best appeal or motion to reopen i donot have enough time.because this time critical issue for appeal.
You need to seek legal advice immediately because timing is critical. Depending on the reason for the denial you can either file an appeal or a motion to reopen/reconsider. If the USCIS made a mistake denying the petiiton then the motion is the way to go and you can even avoid the fee. Both appeals and Motions have a time issue.