When pick up is attempted ,and pick up is not done it could be due to any of the below reasons :-
1.Improper documents (AWB/Invoice missing/Pro-forma missing).These are documents which are most important for any parcel .
2. Missing State related tax forms .You can check tax forms requirement :- http://www.ecourierz.com/tax-forms
3. If parcel is not packed properly then also pick up guy has full authority to reject the pick up .This is for safe transit of your own parcel .
Kindly contact us for more support .