There are a lot of ways to collect Philippine banknotes. Commonly we collect notes by era from the Spanish notes which are rare, US Administration, WWII, Guerrilla / Emergency notes, English Series, Pilipino Series, Ang Bagong Lipunan Series, New Series up to the New Generation series. Another popular way to collect banknotes is by their serial numbers, which is known as “Fancy numbers or Solid numbers”
There are many ways to collect the serial numbers on paper money. Keep in mind that what is considered desirable to one collector may not be for another. The condition of the note is important as well, because the less circulated the note appears, the greater its value will be.
For illustration purposes below, only the enlarged serial number portion of the bill will be shown. The serial number occurs twice on the front of every bill and is printed black, red or blue (scarce color)
Where all the numbers are the same, for example 888888;
Where all the numbers are the same, for example 088888;
Where the numbers read the same both forwards and backwards, for example 018810;
Serial number that starts with 000001
Low serial number, for example 000007 or 000028.
The numbers in “ladders” go up, such as 123456; while “reverse ladders” just go in the opposite direction, or 654321.