Since BSP released commemorative Philippine Peso bills, I began collecting them as souvenirs. But came December 2014, it was announced that old banknotes including the commemorative ones will be demonetized by January 2017. They can be used until last December 2015 and exchanged within this year of 2016. I intended to keep mine, but, alas, I couldn’t for reasons need not mentioned.
I’m keeping the 10-Philippine Peso bill since this was replaced with a bimetallic coin.
The commemorative issues I had were already many, but I believe there are more I didn’t get to see or hold.