What the remedy does
Striking off the defence removes the defaulting party’s right to contest the petition on the merits. They may remain on record, but the court proceeds without their evidence and arguments: a severe consequence, which is why courts approach it cautiously.
The Supreme Court has recognised the power in the context of persistent non-payment of maintenance, on the reasoning that a litigant who ignores the court’s orders cannot simultaneously demand the court’s assistance. Courts in Chennai apply it sparingly and usually after warnings.
The enforcement ladder
Striking off is rarely the first step. It sits at the end of a sequence that starts much earlier and, in most cases, produces payment before the end is reached.
If your defence has been struck off
Restoration is possible. An application explaining the default, together with payment or a credible proposal to clear arrears, is the route. Courts are generally willing to restore where the arrears are cleared and the explanation is honest.
What does not work is continuing to contest the merits while the arrears stand. Clear the arrears or move to vary the order first; the defence is then restorable on terms.