1. Foreign remittance: As a bank customer, you have the option of opening and accessing NRO online. You can access your money and investments in India and receive foreign remittance with a joint holder having resident Indian status. You can also repatriate funds abroad with a transfer limit annually. 

2. Residential status: To open any non-resident account in India’s banks, you need to provide documentary proof that you are now a non-resident as defined by the Indian tax laws. Once you become an NRI, you cannot continue holding bank accounts with resident Indian status. 

3. Documents required: The conversion of a resident account into a non-resident account requires you to submit identity proof, NRI evidence status, proof of foreign address, and some photographs. 

4. NRI status and residence proof: If you plan to open an NRO account India, you need to provide proof of residence abroad like employment details, student status, dependent visa status, or a copy of a residence permit in an overseas destination. This proof requires attestation by the Indian embassy, notary, or an Indian bank with an overseas branch. 

5. Attestation: As an applicant of an NRO bank account, if you want to mention a local Indian address for ease of operation in addition to the overseas address, you need to submit proof along with attestations.