The highly prevalent nature of diabetes in ageing populations is characterized by complexity of illness, an increased risk of medical comorbidities, and the early development of functional decline and risk of frailty. When these are coupled with the common and widespread occurrence of delayed diagnosis, frequent admission to hospital, and clinical care systems that may be sub-optimal, if not inadequate, it is not surprizing that the IDF now feels it is important to address these shortfalls by this Guideline which lays the foundation for high quality diabetes care for older people.