Travisa does state that in any case it is not possible for them to guarantee the visa is going to be issued on the exact same day. To prevent possible problems at immigration, make certain that your passport is valid for at least 180 days at the right time of entry into India. You can submit an application for an ETA tourist visa maximum 2 times per year.
India Visa Application and India Visa Application - The Perfect Combination Paper applications cannot be accepted after that date. Background is going to be enhanced too. All electronic photo submissions have to be taken within the previous few months against an all-white background.