急问8老师：寄出485和131表前还要准备哪些材料

我给在美国的父母办移民。在网上已经提交了130表。纸面的485和131表也已经填好。在确认485表要求寄的材料时还是很困惑。非常感谢要是您能回答下面红字的问题。

• Two passport-style photographs; 护照照片

• A copy of your government-issued identity document with photograph;  我理解是申请人护照，对吗？

• A copy of your birth certificate. If it is unavailable or does not exist, submit other acceptable evidence of birth such as church, school, or medical records, and proof of unavailability or nonexistence;           父母40年代人没有出生证明，能否用结婚公证替代？因为上面有父母的名字和出生日期。

• Inspection and admission, or inspection and parole documentation (unless applying for adjustment under INA 245(i)). For more information and examples, please see the form instructions; 因为是亲属移民，是不是可以不用这个？

• Documentation of immigrant category, such as a copy of Form I-797, Approval or Receipt Notice, for the Form I-130 filed on your behalf (unless you are filing your Form I-485 with the Form I-130 filed on your behalf);

• Form I-864, Affidavit of Support (if required);  这个864表是不是必须的？

• Certified police and court records of all criminal charges, arrests, or convictions regardless of final disposition (if applicable); 无犯罪证明是不是可以不用？
• Form I-693, Report of Immigration Medical Examination and Vaccination Record , or a partial Form I-693 (if applicable).          这个693健康表是不是一定要一起寄出？

在131表格的Checklist中提到了‘ A copy of a USCIS receipt as evidence that you filed Form I-485, if you are applying for adjustment of status; ’ 这个是什么意思？因为我的485和131表是一起提交的，我怎么会有USCIS的receipt呢？