If you buy loose handmade chocolates always ask in the shop how to store them and when to use them by as some ingredients may require refrigeration. Pass on this information to the recipient if the chocolates are going to be a present. If the chocolates are sold in a box check the best before/use by date and any storage instructions such as ‘ keep refrigerated under 5°C’.
Chocolate ‘bloom’ is a whitish coating on chocolate caused either by changes in fat in the chocolate or sugar reacting to moisture. It isn’t a food safety issue may may affect the quality of the chocolate.