When I was called, I gave a 500 peso bill. The teller mentioned that she didn't have enough money for a change and requested that I pay an exact amount.

Typical PH tellers. Hayst.
I never experience this in Japan. Hayst.
Kainis mahirap di mag compare.

And yesss, getting the certificates nowadays are now very fast. It's actually a very improvement from before. Not just PSA actually, but also other government agencies. I think it was from the previous administration or the one before it when I noticed these changes so they must have mandated the agencies to make the transactions fast para naman di na tayo maabala.