ACKNOWLEDGEMENT

acknowledgment, acknowledgement

(noun) a statement acknowledging something or someone; “she must have seen him but she gave no sign of acknowledgment”; “the preface contained an acknowledgment of those who had helped her”

recognition, acknowledgment, acknowledgement

(noun) the state or quality of being recognized or acknowledged; “the partners were delighted with the recognition of their work”; “she seems to avoid much in the way of recognition or acknowledgement of feminist work prior to her own”

Source: WordNet® 3.1

Noun

acknowledgement (countable and uncountable, plural acknowledgements)

(most common British spelling, also sometimes used in the US) Alternative spelling of acknowledgment

Source: Wiktionary