A short note of sympathy is a formal condolence
Step-by-step explanation:
Following are the expression of condolence :-
1.''Our deepest condolence to you upon the passing of'' -This is a type of a formal condolence expression.
2. ''May the peace that comes from the memories of your love comfort you now and the days ahead'' -This is also a type of a expression that is considered as formal for a condolence.
3. ''Although no words can ease the loss you bear, know you are very close in our thoughts and prayers''- This can also be considered as expression of formal condolence.