Inaccuracies in the printing of parking tickets and thefts from social workers were two of Sheffield Council's 100 data breaches. Any breaches of information security or personal data must be reported to the council, who registered 231 instances in 2019–20. Most of these incidents involved consumers and were the result of human error, such as emails or mail being delivered to the incorrect recipient. Five of these violations were deemed significant enough to warrant reporting to the Information Commissioner's Office (ICO).