In the Electronic Secure Bank and Treasury Receipt (eSBTR) system, a person goes to a bank, fills up an application form and makes payment to a designated officer. The officer, after entering the details in online database, issues an eSBTR which acts as a proof of payment and can be used just like a stamp paper.
Franking and e-stamping, which gained prominence following the fake stamp-paper scam involving Abdul Karim Telgi, are vulnerable to duplication, imitation and hacking, an official said.