+0

Kindly advise which sentence is grammatically correct in email & WHY. Thanks!

1) As requested, please see the details below
2) As requested, please see below the details
3) As requested, please see below details

Also

1) Please find the attached copy of the invoice
2) please find attached the copy of the invoice
3) Please find attached copy of the invoice

+2

#1 has the correct word order. The others have awkward word order.

lvp24781) Please find the attached copy of the invoice

Do not use "Please find (attachment)" in business correspondence.

If I get an email with this, I find it rather insulting of my capacity to notice email attachments, and the document was never lost, was it?

These are much better.

A copy of the invoice is attached. 
I have included a copy of the invoice.
The attachment is a copy of the invoice you requested.
Comments  

Thank you AlpheccaStars!

Kindly explain why this sentence is in correct order.

1) Please find the attached copy of the invoice

Please also advise a correct sentence from the following .

It should be "find" or "see"

1) As requested, please see the details below
2) As requested, please see below the details
3) As requested, please see below details