Documents to be taken for EAD
1) Passport
2) I-94
3) Visa documents
4) I765 - Receipt Acknowledgement from INS to prove that 90 days have elapsed.
5) Letter from the Attorney, positing to the INS officials about my right to a temporary EAD, pending adjudication of an EAD petition at the Texas Service Center, after a minimum lapse period of 90 days.
6) Letter (kind of bonafide certificate) of attestation that I am an employee of good standing, etc. from my employer.
But Alas, what am I to say
The local Atlanta INS officials who handle temporary work permits are bunch of simpletons. The officer messed with my Alien Number, even though I immediately brought to her attention that the Alien number on the temporary work permit should match and tally with that in the pending petition with TSC and that she should NOT give me an EAD for one-year, but just a temporary EAD for 6 months. Of course, this officer would not relent.
So, I approached the customer service, where another officer basically took my issue with the officer who had granted me the temporary EAD. After a lot of confabulations and some running between pillar-and-post, I had to barge out of the local-office gnashing my teeth.
It was hell of a nightmare to see how glibly people can work. Hope it doesn't have to be that way for you!