"The Notes app in iOS is widely used by many users for many purposes, whether for keeping a shopping list, password locked personal notes and data, a diary, sketches and drawings, checklists, or whatever else you may want to keep handy on an iPhone or iPad. Because much of the Notes data is personal, if you accidentally delete a note or two it can be a stressful experience and you’d understandably like to recover from inadvertently removing an important note.
Not to worry though, the latest versions of the Notes app allow for an undelete process, allowing users to restore deleted notes to their iOS device, assuming they act within a reasonable time frame."
Via John Evans