To gain a better understanding of the entire procedure, you must first learn what documents are required for the immigration process. The sort of papers required varies depending on the situation, however, there are a few common documents that you may need while filing for immigration. Proof of Sponsor's Citizenship
Visa
Birth Certificate
Marriage Certificate/ Divorce Papers
Police Clearance Certificate
Medical Records
Financial Documents
These are the kind of general documents that are frequently required in various government procedures. However, while filing for immigration, you must convert your original paperwork in to the state's official language. According to the United States Citizenship and Immigration Services (USCIS), translation must be certified.