8老师,皮老师: 现找到了一朋友做co-sponsor, 他是退休的公民, 想请问他所需的经济担保材料要哪些? 与其它在职的人做担保有社么不同? 谢谢!
-The same, and he needs to provide his income information or assets information for the sponsor (I-864 filing).