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How to tell your parents you lost something
Try to predict how your parents will react.
If you're delivering bad news, it can help to try to predict the reaction you may receive. Before confessing you lost something, think about how your parents may feel about this.
Have a little empathy so you can predict the reaction and figure out the best means to deliver the news. What did you lose? Parents are unlikely to be angered by the loss of a small item, but if you lost something big and expensive, they may be angrier.