
The red book says rule F(1) 30a A dog could be disqualified from any award whether an objection has been lodged or not if proved amoungst other things to have been: (3) Not entered on KC approved entry form. (4) Entered after the entries closing date.
The secretary should have asked your friend if she had proof of postage & only took her entry if she agreed she had.
If picked by the KC your friend will be 'stripped'of the awards she won on that day & there may be a fine to pay by your friend & possibly the club involved. Your friend maybe lucky & it may be not picked up by the KC.
If picked up by KC, your friend will not be banned from showing & I wouldn't think the club will ban her either.