The Tern recalls are for certain batches of first gen models made in 2011 and 2012. As long as you don't buy a Tern made in those years you should be fine. There's a simple way to tell - recalled bikes have a frame number beginning with AI.
https://www.ternbicycles.com/2014-li...luntary-recall
Side note: The son of Dahon's founder quit his father's company to start Tern. Dahon is the biggest producer of folding bikes in the world. I hope the son has learned a lesson: That's what happens when you cut corners to save a few bucks.