English grammar help

Uni project, english isnt my mother language, please help.
Which one is correct, more natural and formal/polite?

1. Negative feedbacks can be revised within 1 month of leaving them.

1. Negative feedbacks can be revised within 1 month of them being left.

1. Negative feedbacks can be revised within 1 month of them having been left.

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meant to write 2. and 3.

2 sounds best but feedback doesn't really have a plural so just use "feedback"

god bless your soul. American?

Canadian.

So should I say:

1. Negative feedback can be revised within 1 month of THEM being left.

OR

2. Negative feedback can be revised within 1 month of IT being left.

amazing, thank you so much.

None are correct as it is customary to spell out “one” rather than use the numeral “1” in a sentence.

1 is most natural/conversational. 2, 3 use passive voice which is not necessarily more formal/polite, but leaves more ambiguity about who left or might revise the “feedbacks.”

Also, “feedbacks” sounds strange. I’m asking myself, “Why the plural?”

Depends on context. If it’s like a sign on a suggestion box, it might be like this:

SUGGESTION BOX*

*May revise up to a month.

I didn’t know feedback lacked a plural form. Now I know.
I know I should spell 1 as a word, I can fix that.

I actually need to make both a “buyer” and “seller” see this sentence.

I was thinking of using 1 for the buyer, and 2 for the seller. As the buyer is the one leaving the feedback so he knows who left it, but for the seller is more like a general sentence as he isn’t the one leaving the feedback so the passive voice fits better.

What do you say? Thank you for your help.
Are you american?

Negative feedback can be rescinded for up to one month.

It’s more like a sentence in a help section for now.

Can you check this please?

Did you really intend “can” be revised, like it’s impossible to revise thereafter because the ink finally dried? Did you mean “may” as in revisions are permitted for that period?

I meant that after that period we dont allow buyers to revise their feedback.
Also I’d like to add that they can only do it once.

The original sentence I used was:
Negative feedbacks can only be revised once and only within 1 month of leaving them.

I wanted to use this one for the buyer and this other one for the seller:
Negative feedbacks can only be revised once and only within 1 month of them being left.

But I feel like putting the time limit first is important.

feedback is uncountable

I know now, that’s why I asked if I should say “them” or “it”

I think the final sentences would look something like this:

Negative feedback can be revised within one month of leaving it and can be revised only once. (buyer version)

Negative feedback can be revised within one month of it being left and can be revised only once. (seller version)

Are these fine?

English, particularly American business English is a living language. We change and invent words all the time and for all sorts of reasons. “Feedbacks” is a; plural of feedback which I have never seen, but could totally see a manager making up to proceduralize some series of tasks involving small amounts of feedback from many customers. Such made up words are often employed internally in American businesses as a short way of saying something only employees need to understand.

Your 1 for buyers, 2 for sellers sounds fine.

Negative feedback can only be revised within one month of leaving it and (can be revised) only once. (buyer version)

Negative feedback can only be revised within one month of it being left and (can be revised) only once. (seller version)

These ok?
The second “can be revised” isn’t needed imo.
Thank you for your help

“Can” means to be able. “May” means to be permitted or allowed. Can vs. May is a common error. Should, shall, would, will, could, can, might, may - the distinctions between these sometimes confound even native speakers.

“You can leave feedback,” means it is technically possible or the laws of physics would allow or you have the ability to do so.

“You may leave feedback,” means you are permitted or allowed to do so.

So I should use “may”.

FINAL VERSION(?)

Negative feedback may only be revised within one month of leaving it and only once. (buyer version)

Negative feedback may only be revised within one month of it being left and only once. (seller version)

Everybody approves?