A tour guide hired to welcome guests to the $20 million Venice wedding of Amazon boss Jeff Bezos to Lauren Sanchez has inadvertently given the game away after being snapped with a clipboard of names.

Beatrice Bavato, a freelance tour guide, was photographed as she waited for guests and staff from London based wedding planners Lanza & Baucina in the arrivals hall at the lagoon city's airport.

The clipboard she was holding listed names, flight numbers and hotel destinations for some of the 200 guests due to arrive at the iconic Italian city in the next few days for what has been dubbed the wedding of the decade.

The list also suggests that the bride suffered a last minute stressful cancellation: her first choice nail artist is marked in biro as a 'no show'.

Among those listed on red faced Beatrice's clipboard were Mike and Beth George arriving on a British Airways flight from London and then being transferred to the Al Redentore luxury apartment complex.