Trending @Accenture; How to get my Experience Letter

I have resigned from Accenture and have received the Relieving Letter. However, based on my past company experiences, I believe Experience Letter has a greater value. Accenture provides Experience letter only for the selected purposes,

• Green Card letter

• Citizenship and Immigration Services

• Higher Education letter

• Work Permit

Now I might go out to work abroad and do my PhD in the near future. Is there a way I can get my experience letter now?

Please guide me.