Immigration Site

The situation is this - An undocumented immigrant is getting married to a US citizen. However, spouse of the immigrant dont meet the 125% of poverty guideline (basically dont make enough money to financially support the immigrant according to I-864), so joint-sponsor is needed. I am aware that this joint-sponsor doesnt have to be someone of a relation such as US citizens parents or relatives.

My question is:
1) After I-864A has been filed with the joint-sponsor, does that sponsor have to provide additional information later on to prove that they are actually the one to financially supporting the immigrant? Also,
2) Does the joint-sponsor have to live in the same household as the married couple?

I ask these because the immigrant needs someone to sponsor him; however that joint-sponsor wont actually be supporting him financially. In reality, his parent (also undocumented) will be able to support him to get by until he gets the EAD, but obviously they cannot sponsor him on paper because of their status.

Bump.... was at 2nd page and no replies. Id really appreciate any help/advise! Thanks

I ask the question #2 because although I believe someone has already answered that question for me in this forum, which said that they dont have to live in the same household, but I keep reading the form instruction and I cant find anywhere that specifies that.

The co-sponsor filing the I-864A does not have to be a member of the household nor has to be related to you. He/she must be a US Citizen. He/She will have to submit financials to prove that he/she can take care of the beneficiary. The petitioner still needs to file the I-864 individually and I-864A along with the co-sponsor.
Make sure that the undocumented beneficiary entered the US legally or else marrying a US citizen will not help.