The match was taking place in aid of the charity My University Hospital Sussex.
The following is an official club statement:
Worthing FC are saddened to hear of the news that someone closely linked to My University Hospitals Sussex has recently passed away, and that the planned match between Premier League Legends and Non-league legends scheduled for 9th July at Woodside Road is now postponed.
We apologise for any inconvenience caused, anyone who purchased tickets for this event can expect a full refund within 5 working days.
We look forward to working with this excellent charity again in the future.