I have seen 'thank you in advance' or 'thank you in anticipation' in old business writings.
It is generally not used in writing in western countries though it is a common practice in Asia.
It has to do with culture. Asians tend to overemphasize on being polite and formal whereas westerners.
tend to do away with formalities. Examples are words like 'hereby', 'herewith','hereunder', etc which
are used less in western writing except legal documents but are common in Asia.
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