I'm a cashier at the bank. I lost my blank card because of my work mistake. I'd like to ask for a written complaint for my mistake. Thank you.
Dear leader, I lost my blank card due to my work mistake, and I am deeply sorry for the impact on the bank. Reflect on the shortcomings of carelessness in your work. I will take this mistake as a lesson, always urge myself to correct my shortcomings, treat my work seriously and responsibly, strive to overcome the shortcomings of recklessness and carelessness, and learn business to strive for better service for customers.