“The High Court does not ordinarily permit a belated resort to the extraordinary remedy because it is likely to cause confusion and public inconvenience and bring in its train new injustices, and if writ jurisdiction is exercised after unreasonable delay, it may have the effect of inflicting not only hardship and inconvenience but also injustice on third parties. It was pointed out that when writ jurisdiction is invoked, unexplained delay coupled with the creation of third party rights in the meantime is an important factor which also weighs with the High Court in deciding whether or not to exercise such jurisdiction.
In the case of pension the cause of action actually continues from month to month. That, however, cannot be a ground to overlook delay in filing the petition………. If petition is filed beyond a reasonable period say three years normally the Court would reject the same or restrict the relief which could be granted to a reasonable period of about three years.”
Shiv Dass v. Union of India – 2007 (9) SCC 274