A scammer will contact their victim via an online sales ad, such as an ad on Craigslist or Facebook Marketplace, asking to purchase the item. The scammer will send their victim a check in an amount that is more than the agreed upon purchase price and ask the victim to send the overage back to them immediately. The check gets returned and the victim is left to cover the loss. Visit the following FTC link for further details: https://www.consumer.ftc.gov/features/fake-check-scams