To make electronic payments efficient and more secure, the Reserve Bank of India on Wednesday said it will issue revised directions by October 11 to allow ‘inter- operability’ among prepaid payment instruments (PPIs). PPIs are substitute of paper currency or cash that prepaid payments industry issues in the form of paper coupons, mobile wallets or electronic formats. It is expected that PPIs can inter-operate within six months of the revised directions, RBI said in the ‘Statement on Developmental and Regulatory Policies’ on Wednesday. “Inter-operability amongst KYC compliant PPIs shall be implemented within six months of the date of issuance of the revised master directions, which will be issued within a week, i.E., by October 11, 2017,” it said.