- The National Memorial Arboretum
- 16,707 total number
- United Kingdom (Burton-upon-Trent)
The most contributions to a greetings card is 16,707, and was achieved by National Memorial Arboretum (UK) around the UK, between 1 October and 13 December 2016.
The National Memorial Arboretum created the card in recognition of the continued service and sacrifice of the UK's Armed Forces.
The card featured a poppy set against a background of more than 800 photographs taken at the Arboretum. It measured 2.1 m (6 ft 10 in) high and 4.5 m (14 ft 9 in) wide when opened out.