Question

ac·knowl·edg·ment
 ( also   ac·knowl·edge·ment) /ıkˈnɑːlıʤmənt/  noun  ,  pl   -ments
  1 : the act of acknowledging something or someone: such as
  1 a : the act of showing that you know, admit, or accept that something exists or is true
   [  count  ] The killer's apology was an acknowledgment [=admission] of his guilt. = The killer's apology was an acknowledgment that he was guilty.
    The day passed without any acknowledgment that it was their wedding anniversary. [=no one mentioned that it was their wedding anniversary]
    They made several public acknowledgments of their company's mistake.
   [  noncount  ] He paid the fine without acknowledgment of his guilt.
  1 b : the act of praising or thanking someone for an action or achievement
   [  count  ] Special acknowledgments will be made at the end of the meeting.
   [  noncount  ] He has finally received the acknowledgment he deserves for his charitable work.
    They presented him with an award in acknowledgment of his charitable work.
  2 acknowledgments [  plural  ] : a section of a book, article, etc., in which people are thanked for their help
   He's the first person mentioned in the book's acknowledgments.
  3 [  count  ] : a usually written statement saying that a letter or message was received
   We sent an acknowledgment that we received their letter.
   He never received an acknowledgment of his payment.