Acknowledge vs. Thank

Difference Between Acknowledge and Thank
Acknowledgeverb
(transitive) To admit the knowledge of; to recognize as a fact or truth; to declare one's belief in
to acknowledge the being of a godThanknoun
(obsolete) An expression of appreciation; a thought.
Acknowledgeverb
To own or recognize in a particular quality, character or relationship; to admit the claims or authority of; to give recognition to.
Thankverb
(transitive) To express gratitude or appreciation toward.
She thanked him for the lift.Acknowledgeverb
To be grateful of (e.g. a benefit or an favour)
to acknowledge a favorThankverb
(transitive) To feel gratitude or appreciation toward.
I'll thank you not to smoke in my house!Acknowledgeverb
To notify receipt, as of a letter.
I acknowledge the receipt of your letter.Thankverb
(transitive) To credit or hold responsible.
We can thank global warming for this weather.Acknowledgeverb
To own as genuine or valid; to assent to (a legal instrument) to give it validity; to avow or admit in legal form.
Thankverb
express gratitude or show appreciation to
Acknowledgeverb
declare to be true or admit the existence or reality or truth of;
He admitted his errorsShe acknowledged that she might have forgottenAcknowledgeverb
report the receipt of;
The program committee acknowledged the submission of the authors of the paperAcknowledgeverb
express recognition of the presence or existence of, or acquaintance with;
He never acknowledges his colleagues when they run into him in the hallwayShe acknowledged his complement with a smileit is important to acknowledge the work of others in one's own writingAcknowledgeverb
express obligation, thanks, or gratitude for;
We must acknowledge the kindness she showed towards usAcknowledgeverb
accept as legally binding and valid;
acknowledge the deedAcknowledgeverb
accept (someone) to be what is claimed or accept his power and authority;
The Crown Prince was acknowledged as the true heir to the throneWe do not recognize your gods