threatening by APIO on filing RTI application

there are no provision in RTI act for the safety of rti applicant.

You may make a complaint to the higher officer of the APIO regarding the same.

since you are working on a contract basis,i doubt in the probability of success in complaint.  only after accessing the risk of losing your job (they may not renew your contract and may terminate your service on flimsy grounds)
you may proceed with the complaint part.

Complain to:

1. CIC

2. Dept of Personnel & Training

3. Secretary where APIO is working.

4. Contact parivartan.com (Mr. Arvind Kejriwal)

Don't sit and relax. Move and act.

Dear Anil Agarwal,

How can he make a complaint in this regard,as the threat is verbal?

Please remember that the complainant is working on a contract basis and how he will be able to prove his case of verbal assault.

Many a time,one may have to sit and relax inorder to save himself from further harm

I still maintain that making a complaint against the APIO would put some sense on other APIOs. In any case, he does not lose anything. The officers carry the hang over of the British Raj and unless constant complaints are made by all of us, they would not be amenable to any law. The problem is that once we get over the problem, we tend to overlook, forget and are advised to let it go. It is happening with every public dealing departments. In the rural areas, they are the lords and our service attitude makes them real lords.