Art grant receipt requirements

I have been trying to find clear and concise information about what is needed for a receipt to be valid for it to be able to be claimed using my art grant.
The email I got from the Art people specified 'original receipts', but this doesn't clarify what that means precisely. For example, there was also talk that Amazon receipts are not valid or generate problems. What does this mean? What must one do for a receipt to be valid, if one wants to get stuff from Amazon?
Furthermore, I will have significant materials for the art project purchased by Amber as part of the big materials order that the independence team are making close to the site. They can only provide a tax invoice from the supplier, which will not be itemized. She can, however, include the order breakdown. Will this generate a problem for me to claim these costs through my art grant?
@oliviaehe
Here are the guidelines! https://docs.google.com/document/d/12vNr72R7WmiwWDG54ntO7FGaHVoZV5jFfFRhQYOBCbQ/edit?usp=sharing

Jesse Wheaton Mon 21 May 2018 5:21PM
please let us know the answer as well! @ezequielmuns
Jag Chadha Tue 22 May 2018 8:40AM
Same same.

Ezequiel Muns Tue 22 May 2018 10:12PM
I have been pointed to the Art Grants Refunds & Receipts document by Arthur. See there the answers to these questions.

Arthur Taylor Wed 23 May 2018 6:00AM
Just to note that these are a draft and the process for requesting refunds is not live until the A&A people confirm it.

Olivia Ehe Wed 23 May 2018 11:37PM
Hey all -- we are hoping to get an email out to all artists as soon as possible -- was hoping today but will probably be tomorrow or friday. so sorry for the delay!! tell you friends

Olivia Ehe Sat 26 May 2018 3:13PM
@ezequielmuns there are screenshots for you specifically for amazon in that doc above
Jag Chadha Sat 26 May 2018 4:53PM
Thanks for the screenshots Olivia, they clear up a lot of ambiguity and uncertainty!
Thomas Schneider Sat 26 May 2018 6:42PM
Hey Olivia!
We have a guide specifically on obtaining proper receits for amazon purchases. Right now I cant find it myself so thank you for pointing at the issue! I will come back to you shortly with the information you requested and update it on the internal comms refund guide.
Have a great weekend!
Thomas
waldo Sun 27 May 2018 2:05PM
I think you mean this one: https://docs.google.com/document/d/1Ohq6VUl09i7K9tnxk7y2wvxMhMcv4Jut4lCmJSeAOeY/edit
Hanna-Maija Helvi · Sun 20 May 2018 11:44PM
Arthur would be the rite person to answer. @arthurtaylor