im not sure if im repeating someone else's answer.
1) nowadays if ur expected salary is above 3k or 3.2k/monthly, its HR procedure to ask for 3 mths payslips. but u need to ask them to cross it out in front of u and mark it as "USE FOR (COMPANY NAME)"
2) if ur expected salary is above the average (or incomparable with ur years of exp), they will also ask for it. For stronger proof to the management.
3) if ur expected salary is 20%+ higher than ur current/previous salary, confirm they will ask.