How or When does the facevalue of the share increase?

General
1

Are there any scenarios where there face value of the share increase?

2

Face value decreases on Forward Stock splits.

Face value increases on Reverse Stock Splits.

Bonus shares does not affect Face Value.

3

Had there ever been a instance of reverse stock splits

4

http://www.moneycontrol.com/stocks/marketinfo/splits/
Yeah few small cap companies reverse split in order to meet exchange requirements.
Look at the link and check out companies old and new face values, example Vertex Spinning