Menopause is the very last period. Because the final periods can be irregular, menopause is confirmed 12 months after the last period. Any bleeding or spotting after this is postmenopausal bleeding. It is not normal to bleed or spot 12 months or more after the last period.
Postmenopausal bleeding needs to be checked out by a doctor. Mostly, the cause will be something very simple and treatable, but occasionally it is a sign of more serious disease.