８老师：
非常感谢。我们决定I－８２４，那么需要准备什么材料？
-I-824 application for following to join documents:
1. Form I-824. Application on an approved Application or Petition
2. A copy of your spouse's original I-485 application
3. A copy of your spouse's I-485 approval notice
4. A copy of your spouse's green card (both front and back sides).
5. A copy of your marriage certificate
6. A check of $405
After USCIS approve the I-824 following to join application, they will forward it to National Visa Center (NVC). Then, NVC will contact your spouse and give him instructions. After NVC complete the process, they will forward the documents to the US Consulate in Canada and the US Consulate will contact you for the immigration visa interview.
