From a lawyer friend

From a lawyer friend:
*Very important message*
While writing a date in the upcoming year 2020, we should write in its full format, e.g. 31/01/2020 and not as 31/01/20., bcoz anyone can change it to 31/01/2000 or 31/01/2019 or in between any year to suit his convenience.
So be cautious about this. Don't write and also don't accept it in any documents, lest it could lose its importance.
This problem will persist only during the year 2020.

上述英文本來自一個律師的朋友。他給我一個忠告。到2020年當書寫日期在文件或者支票時要小心。在日期這一欄書寫日月年時。切記小心將年份要全寫。例如2020年。因為簡寫年份20容易給別有用心人士將之更改。會導致文件失去法律效力。