When does the Finance charge get populated in Receivable JV and is it mandatory ?

Suggestions:
Account receivable JV is the amount which the company owes from the customer for selling its goods or services and the journal entry to record such credit Sales of goods and services is passed by debiting the accounts receivable account with the corresponding credit to the Sales account.
System populates the Finance charges when users have entered Finance changes in the credit note. Due to which system treating the receipt as Advance receipt. Users can remove the Finance charge from Receivable JV in order to save and confirm. Finance charge is not a mandatory field in Receivable JV.