Definition: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
Input: More than £1.5bn in old fivers and tenners has still not been cashed in more than a year after the last of them ceased to be legal tender.

More than £1.5bn of outdated £5 and £10 notes not returned