Hi, The employer has the right to appeal before the Appellate Authority against the order of ACL, and the timeframe for that is 60 days, I think. Have you checked whether the employer has gone for an appeal? But in your case, it looks like even after the lapse of 3 months of the ACL order, gratuity has not been paid.
You can approach the ACL office again and inform them about the non-compliance. Please check with the ACL office for any specific forms required, or a normal letter will be sufficient. Subsequently, ACL (Controlling Authority) will issue the necessary order for the recovery of the amount of gratuity with interest from the employer. I think the recovery process will be through the District Collector.
In most cases, ACL will hold this process based on the employer's request to provide some breathing time for the employer to make the payment. However, once the order is passed, the employer has no other option but to pay, although they might delay the process using influences.