Does "ground" have a money back guarantee when it comes to transit time like the premium services such as NDA and SDA? From a UPS Store which I serve there was rather recently sent a ground package that did not make it to the destination on the day it was supposed to arrive. The question arose as to whether the customer should receive a refund of the shipping charges. The UPS Store owners were told the answer was "no," that there is no such guarantee with any of the ground. (I have always understood "Basic" as not having the guarantee.) Anyway, this surprised me because I have known the twilight sort to go to great effort to try and get every ground package out of the building, making especially sure the "hots" (that are ground) get on the very specific trailers so they can be delivered the next day and remember hearing ground packages left in the building refered to as "service failures," just like say an air package delivered after the commit time. Have there been any recent changes in the guarantees UPS offers, or what's going on here?