Ive got a Google Drive spreadsheet that is shared with a specified number of people. At one stage there was possibly a Google Apps Script as part of the spreadsheet, but i think this is now removed.
When I go to the sharing preferences I see this: (see screenshot below)
But the banner at the top says the last change was made by anonymous… how can this be?
UPDATE
Some people have suggested the reason is to do with the fact that the document is shared on an "anyone with the link can edit / view" setting. But this is not the case. The comment below also refers to another thread, but in that thread the question relates to a document where the access is set to "anyone with the link can edit / view"
Best Answer
I have run into this before. If you are using a Google Form, Google is under anonymous when it re-uploads more information. It could also be you (Or the owner of the document) isn't allowing others to see the information. Next to the comment button in the top right of the screen there is a little lightning bolt line with an arrow pointing up. If you click on that, it opens up your activity dashboard. You can see who has viewed youe document and when they did. Under privacy settings in the subhead, you can select or deselect options on what people can and can't see. If it is deselected, you may see an anonymous.