Final answer:
Corrected timecards for prior pay periods can be certified at any time after the mistake is discovered. It is important to rectify any errors in timecards as soon as possible to ensure accurate payroll and avoid any legal issues.
Step-by-step explanation:
Corrected timecards for prior pay periods can be certified at any time after the mistake is discovered. It is important to rectify any errors in timecards as soon as possible to ensure accurate payroll and avoid any legal issues. Employers usually have a process in place for employees to submit corrected timecards, which may involve filling out a form or notifying the payroll department.