Originally Posted by
WineCountryUA
Over the years Plats (like myself) have been declined when calling in (although a rare occasional success report has occurred)
Maybe I am speaking out of context, but I have called in as a Silver and gotten them to clear it with PZ>0 and being on a B fare. I've actually never seen the fabled upgrade button. This seems to be the only way to do this and also get a valid receipt.