Final answer:
The problem with the else statement not working is likely due to a typo in 'balance.appened', the misuse of the 'balance' list in the if condition, and an IndexError due to an empty 'notes' list.
Step-by-step explanation:
The issue with your else statement not executing as expected might be due to several potential problems in the code. The first one is a typo in the balance.append method where it's incorrectly spelled as balance.appened. This will cause a runtime error before the else statement is even reached.
Secondly, the condition if(balance < 0): assumes balance is a single number, but balance is actually a list, so you need to compare the balance for each individual client within the loop using balance[i] instead. The if-else block also needs to be inside the for loop so that it checks each client's balance after it is calculated.
Finally, there is a logical error since the notes list is empty, indexing it with notes[i] within the else block will cause an IndexError.