One time password, a four digit random number is used widely for verification of food delivery, online shopping, taxi booking and at many other places. Now it is used so frequently that people became chill in sharing it with others.
Sharing OTP with others can leave you empty handed, an OTP generated for financial transactions should be unique and different from the OTP generated for other purposes. like 6 digits alphabetical OTP can be reserved for financial transactions only. This practice will make people more conscious while sharing alphabetical OTP with others.
Also the power to verify these 6 digits alphabetical OTP should be limited financial institutes.

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