"open acknowledgement" is correct and usable in written English.
You can use it to indicate a clear recognition and acceptance of something. For example, "We appreciate your open acknowledgement that there is an issue that needs to be resolved."
I became hooked on that open acknowledgement of suffering.
Consequently the ship was constantly out of position, and there was an open acknowledgement of hostility between the liaison man and the captain.
What has made Cannes' open acknowledgement of this so amusing is that the film festival has attempted to put some kind of feminist spin on proceedings this year.
Such a declaration was tantamount to an open acknowledgement of the secret war between the organisation and Israel after the latter's withdrawal from most occupied Lebanese territories in May 2000.
What was new was the open acknowledgement that a man as driven, intelligent, and ambitious as Bill Clinton might want a wife who was his equal in all those dimensions, rather than one who was a helpful, pliable, even decorative subordinate.
The 87-year-old Queen remains in good health, but there is now an open acknowledgement in royal circles that the Prince of Wales will increasingly take on more of her duties, in what some constitutional experts can even foresee becoming an unofficial co-regency.
In contrast, Glyndebourne's open attitude, its acknowledgement of hurdles and difficulties, may prove wise.
It was an open and honest acknowledgement that in terms of back-row specialisation, the visitors will head for Cardiff with two loose forwards who are neither one thing nor the other.
Imperial Bedrooms opens with an acknowledgement of the Less Than Zero novel and film both as actual items within the fictional history of Imperial Bedrooms' Clay; he describes "The movie was based on a book by someone we knew….
The last draft document has left the Acknowledgement section open [ 2].
A tacit acknowledgement that opening your feelings up and being exposed in that way is probably the most frightening thing of all.
