Acknowledgment vs. Recognition

Recognition is a synonym of acknowledgment
As nouns the difference between recognition and acknowledgment is that recognition is the act of recognizing or the condition of being recognized while acknowledgment is the act of acknowledging; admission; avowal; owning; confession
Acknowledgment / [Alternative form: acknowledgement] - Noun
  The act of acknowledging; admission; avowal; owning; confession.
  The act of owning or recognizing in a particular character or relationship; recognition as regards the existence, authority, truth, or genuineness.
  An award or other expression or token of appreciation.
  An owning with gratitude of a benefit or an obligation (as in "acknowledgment" of a favor).
  A message from the addressee informing the originator that the originator's communication has been received and understood, as a wedding invitation's acknowledgment .
  (Telecommunications|computing|networking) A response (ACK) sent by a receiver to indicate successful receipt of a transmission.
  An owning as genuine or valid; an avowing or admission in legal form (as in "acknowledgment of a deed").
  (legal) A formal statement or document recognizing the fulfillment or execution of a legal requirement or procedure.

Synonyms: act of acknowledging) confession, concession, recognition, admission, avowal, recognizance, 

Recognition (Noun):

  the act of recognizing or the condition of being recognized
     He looked at her for ten full minutes before recognition dawned.
  Warwick observed, as they passed through the respectable quarter, that few people who met the girl greeted her, and that some others whom she passed at gates or doorways gave her no sign of recognition; from which he inferred that she was possibly a visitor in the town and not well acquainted.
  an awareness that something observed has been observed before
  acceptance as valid or true: The law was a recognition of their civil rights.
  With fresh material, taxonomic conclusions are leavened by recognitionthat the material examined reflects the site it occupied; a herbarium packet gives one only a small fraction of the data desirable for sound conclusions. Herbarium material does not, indeed, allow one to extrapolate safely: what you see is what you get
  official acceptance of the status of a new government by that of another country
  honour, favourable note, or attention - The charity gained plenty of recognitionfor its efforts, but little money.

Derived terms: * character recognition * OCR / optical character recognition

Source: http://wikidiff.com/acknowledgment/recognition