What is an example of an inappropriate Complimentary Close on a business letter?

An example of an inappropriate Complimentary Close in a business letter is "Yours Truly, Best Wishes," or "With Love," as these phrases convey a casual or overly personal tone that may not be suitable for formal business correspondence. Instead, a more appropriate closing would be "Sincerely," or "Best Regards," which maintain professionalism and respect. Choosing the right Complimentary Close is essential to convey the appropriate level of formality in business communication.