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People like to go cashless nowadays, so, do any temples have e-Hundis to accept donations either through card or Paytm (a payment gateway) in temples?
Is it permitted in our scriptures? Have any acharyas commented on it?
If whatever is not prohibited is allowed, then it is allowed. Since scriptures couldn't have known about electronic funds transfer, it is not prohibited.
In fact it is routine now to do pujas, samskaras etc. through teleconferencing.