Herewith
/ˌhɪrˈwɪð,ˌhɪrˈwɪθ/
Definition 1 of 2
Pro Tip 1/3Document Attachment
Use 'herewith' to indicate that a document or item is included with the communication. 
Please find herewith the requested documents.
Pro Tip 2/3Formal Context
Mainly used in formal written contexts like business or legal communications. 
Enclosed herewith is the invoice for your review.
Pro Tip 3/3Email Usage
Commonly used in emails to refer to attachments or enclosed items. 
I have attached herewith the presentation slides.
Compare with
CorrespondHereby
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