Using either phrase, “pending approval from” or “pending approval by” are both correct. However, the use of the preposition “from” or “by” will determine whether you’re using it right in a sentence.
So, you may use either “from” or “by,” but the context may make what you’re saying sound awkward in its conveyance. Not that it’s wrong, but sometimes it will sound strange depending on the sentence’s substance.
Using “By” or “From” with “Pending Approval”
Knowing whether “from” or “by” will be correct in tandem with “pending approval” for conveyance of meaning, it’s imperative to understand both prepositions. “From” indicates something that is away or at a distance.
We will move forward with our plans pending approval from the officer.
“By” as a preposition carries a variety of meanings. It could identify a noun that’s to perform an action or a method of achievement. Alternatively, it could indicate a deadline, location, period of time or an issue of concern.
We will move forward with our plans pending approval by the officer.
As long as we get the pending approval by noon, we can move forward with our plans.
Pending approval by our efforts, we will be able to move forward with our plans.
Awkward Use of “By” or “From as a Preposition with “Pending Approval”
The examples below show the proper way to use “by” or “from” and its awkward counterpart. This will usually pertain to when you need to speak about “time” in regards to “pending approval” versus the actions of a location or person.
This request is pending approval from this afternoon.
This request is pending approval by this afternoon.
Zackary is awaiting the go-ahead pending approval by the end of the month.
Zackary is awaiting the go-ahead pending approval from the end of the month.
Pending approval from Monday to Wednesday, I should have a certified visa.
Pending approval by Monday to Wednesday, I should have a certified visa.
So, as a general rule, you want to use “by” when you’re “pending approval” at a specified time or deadline. You can use “by” or “from” when you want to indicate “pending approval” due to the specific actions of a person or location. It’s not difficult, but you may want to check your work against both prepositions when in doubt.