Is 'As per our discussion' and 'As per your instructions' wrong? [duplicate]

Is As per our discussion, ... and As per your instructions, ... wrong, and are they poor grammatical constructions?

As per our conversation, I will tender my resignation on Friday.

Per our conversation, I will tender my resignation on Friday.

Do I use Per or As per in these constructions, or is neither preferred? If neither, what are viable, concise substitutes?

Solution 1:

Either is acceptable usage in American English.

As per is a bit redundant, though. It is essentially: As according to our conversation.

So, feel free to use either construct. But, Per our conversation is a bit more succinct with roughly equivalent meaning.