The I-601A provisional waiver may help your undocumented spouse from Mexico get a green card depending on the situation of the case. This waiver is specifically designed to help people whose only inadmissibility issue that they have is for illegal presence in the United States. This means that when a person is illegally in the United States for over one year and they go to the consulate to obtain a visa, they are automatically subject to a 10-year penalty for re-entry to the United States. The only thing that is going to waive is the penalty for illegal presence in the United States. It would not waive any criminal grounds of inadmissibility. It would not waive any fraud grounds of inadmissibility. If a person has any of those grounds of inadmissibility, this is not the right waver for them. It is just going to cover the inadmissibility based on illegal presence in the United States, so when they go to the consulate, they are not stuck outside of the United States for 10 years.