A liberal view must be taken in matters of condonation of delay.

Lahoti Overseas Ltd vs. DCIT

In every case of delay, there can be some lapses on the part of the litigant concern. That alone is not enough to turn down the plea and to shut the doors against him, unless and until, it makes a mala-fide or a dilatory statutory, the court must show utmost consideration to such litigant. In matters concerning the filing of appeals, in exercise of the statutory right, a refusal to condone the delay can result in a meritorious matter being thrown out at the threshold, which may lead to miscarriage of justice. Since the employee who was earlier handling the tax matters of the assessee company, while leaving the job of the assessee company, did not handover the relevant papers either to the assessee or to the next person, a fact which caused the delay, the delay was liable to be condoned by taking a lenient view.

Article referred: http://itatonline.org/archives/2016/05/page/2/