'The phrase "do the needful" is a formal way of saying "please do what is necessary" and has its roots in British colonial rule in India. When the British established their administration in India, English became the language of government, education, and many aspects of public life. This led to the creation of Indian English, a variant of English that incorporates words and phrases from Indian languages and uses certain expressions more commonly or differently than in other English-speaking countries. The phrase "do the needful" is a good example of this. It was commonly used in British English during the time of the British Raj in India, and while it has become somewhat archaic in Britain and other English-speaking countries, it has remained in use in Indian English. The phrase is seen in formal, official, and business contexts in India and is understood to mean taking the necessary action or steps in a given situation without needing explicit instructions about what those actions should be. Its persistence in Indian English reflects both the historical influence of British English on the subcontinent and the unique evolution of English usage in India. Indian English has developed its own norms and standards, making it a distinct variety of English that reflects the cultural and linguistic diversity of India.'
'The phrase "do the needful" is a formal way of saying "please do what is necessary" and has its roots in British colonial rule in India. When the British established their administration in India, English became the language of government, education, and many aspects of public life. This led to the creation of Indian English, a variant of English that incorporates words and phrases from Indian languages and uses certain expressions more commonly or differently than in other English-speaking countries. The phrase "do the needful" is a good example of this. It was commonly used in British English during the time of the British Raj in India, and while it has become somewhat archaic in Britain and other English-speaking countries, it has remained in use in Indian English. The phrase is seen in formal, official, and business contexts in India and is understood to mean taking the necessary action or steps in a given situation without needing explicit instructions about what those actions should be. Its persistence in Indian English reflects both the historical influence of British English on the subcontinent and the unique evolution of English usage in India. Indian English has developed its own norms and standards, making it a distinct variety of English that reflects the cultural and linguistic diversity of India.'
Indian English or not, it’s unimaginable for me how a native English speaker can not intuitively understand what it means. An English is hard to decipher only if it has entirely new words not in your vocabulary at all.