Green card expires mid trip

[Lstanick15 9]

So my sister is planning on getting married in May 2019 and hopefully I'll be attending. I planned on going home May 14-28 but my 2 year temporary green card expires May 18th so I have not made any final travel plans. I'm aware of the 90 day rule that we can't apply for removal of conditions a day before and have also seen that the current processing times are 17-21 months. I have seen some posts regarding an extension letter but am unaware of how this works. Do you contact USCIS directly for the extension or do they automatically send one out? Any information anyone has would be greatly appreciated! 

[neoblast 138]

You automatically receive an extension letter once your application is accepted. There's nothing for you do except file within the 90-day window.

[Wuozopo 4,293]

The receipt you get (NOA1) for filing will have wording that says your greencard expiration is extended for one year or eighteen months. Apply early enough so you have the receipt to take with you.

[iMean 4]

1 hour ago, Lstanick15 said:

So my sister is planning on getting married in May 2019 and hopefully I'll be attending. I planned on going home May 14-28 but my 2 year temporary green card expires May 18th so I have not made any final travel plans. I'm aware of the 90 day rule that we can't apply for removal of conditions a day before and have also seen that the current processing times are 17-21 months. I have seen some posts regarding an extension letter but am unaware of how this works. Do you contact USCIS directly for the extension or do they automatically send one out? Any information anyone has would be greatly appreciated! 

You do not need to contact USCIS directly for extension, you need to apply removal of conditions within the 90-day window, before the card expires.  After you file, you will then receive receipt stating extension of one year.  Here's the link you can use.  https://www.uscis.gov/green-card/after-green-card-granted/conditional-permanent-residence