On my wedding day, I checked out of Ellerman House in Cape Town, and decamped to the venue. Getting dressed, I realised, to my horror, that I didn't have my tie...must have left it at EH in a scrum of shopping bags next to the rubbish bin; assumed housekeeping probably threw it out.
Phoned up Ellerman House in some panic, to be told that a driver was already en route with my tie! Now that's service that you never forget.