The new banknotes have different sizes to prevent forgery.

The new banknotes had more features to prevent forgery.

Each piece was to differ minutely from another to prevent forgery.

The banknotes have "different shapes and sizes to prevent forgery".

The reasoning behind this was to prevent forgery.

The numerals printed on the stamp are of the complex style to prevent forgery.

The same source also indicated that the banknotes will have "different shapes and sizes to prevent forgery".

The features also help to prevent forgery and minimize the abuse of Singaporean passports.

Watermarks continue to be used today as manufacturer's marks and to prevent forgery.

The main goal of security printing is to prevent forgery, tampering, or counterfeiting.