Will the January 2018 government shut down affect the NSF postdoc awards?
The NSF recently changed its accounting practices, so that money for awards are committed all at once, rather than year-by-year. So, that means that the funding for your award should already have been “available” when you got the notification. Unfortunately, a shutdown means that no further processing will likely take place until it ends, so there may be some delays in the start of your award. But I can’t imagine a scenario where the NSF cancels awards it was planning to make because of the shutdown.