Complex sentence: Use of carbon paper has been mostly superseded because of electronic means such as photocopying; however, it is still used in situations where instant copies of written documents are needed, e.g. for receipts at point of sale or for on-the-spot fine notices.
Split into simpler sentences: Use of carbon paper has been mostly superseded because of electronic means such as photocopying. Examples of this are receipts at point of sale or for on-the-spot fine notices.