Can someone be an affidavit if they receive food stamp ?

There is a possibility that your sister who is on food stamps may be able to provide an affidavit of support for you as the form does not ask whether the financial sponsor has received government assistance. But please note that any government assistance or unemployment monies cannot be the basis for the financial support. Insofar as your brother is concerned, a person who just began working and has no other history of paying taxes or having considerable assets would be a poor candidate to provide an affidavit of support. Due to the limitations of the Lawyers.com Forums, Alan Lee & Arthur Lee, Esqs.’ (the "Firm") participation in responding to questions posted herein does not constitute legal advice, nor legal representation of the person or entity posting a question. No Attorney/Client relationship is or shall be construed to be created hereby. The information provided herein by the Firm is general, and requires that the poster obtain specific legal advice from an attorney. The poster shall not rely upon the information provided herein as legal advice nor as the basis for making any decisions of legal consequence.