Anyone over 18 years of age residing in India; who has a natural inclination to observe while shopping and cares about the service he/she receives can become a mystery shopper. Good English language skills (reading & writing) are an added advantage.
Since most assignments have to be submitted on the Internet, having access to a computer & internet is also beneficial. We also have audits where the reporting can be done over the phone or over mail so please do not feel disheartened if you are not computer or net-savvy.
Also, there are no special qualifications required to be a mystery shopper. Eye-for-detail, respect for deadlines & good English communication skills would help you sail through.