Reliance Digital — laptop invoice

I'd purchased a hp laptop in year 2016 from your store at kurla and my invoice have got fainted and its not visible. I want to sell my desktop and the seller is asking for a invoice. Since after contacting your store from where i have purchased i was unable to get my problem solved, i request you to provide me a soft copy of my invoice details for my easy selling.

Please let me know the details required for the same

Thanks in advance