The spokesperson added that the company has worked closely with National Payments Corporation of India (NPCI), bank partners, and the Indian government on these details of how its service works.
WhatsApp had received permission from NPCI to tie up with banks to facilitate financial transactions via Unified Payments Interface (UPI).
"We still do not have a launch date but this terms and policy update bring us one step closer to full launch," the spokesperson said but declined to comment on the launch date of the service.
WhatsApp payment service, which rivals the likes of Paytm, has been in beta testing over the last few months. Industry watchers expect the full-fledged launch in the next few weeks.
As part of the updated terms, WhatsApp said it may collect additional information when payments service is used.
"We've added new features like interoperability that request additional information (related to) WhatsApp payments user and user of any BHIM UPI-enabled app," the spokesperson said.
The terms state that WhatsApp collects information "when you send, receive, or request a payment, including the date and time and reference transaction number". Also, when someone makes a payment to a WhatsApp contact, the company collects the sender and receiver's names and BHIM UPI IDs.
The company added that it uses "all the information we have to operate, provide, improve, understand, customise, support, and market our services".
"This includes using the information to provide payments and customer support, to protect you and others using our services from fraud, abuse, or other misconduct, and to review your account activity to determine whether you continue to meet our Terms and Payments Terms," it added.
It also outlined that the company works with "the other Facebook companies to provide payments, including to send payment instructions to PSPs (payment service providers)".
Paytm founder Vijay Shekhar Sharma had earlier this year alleged that WhatsApp's UPI payment platform has security risks for consumers and is not in compliance with the guidelines.
The Reserve Bank of India has mandated all payment system operators to ensure that data related to payments is stored only in India giving firms six months to comply with it.
According to sources, the ministry of electronics and IT has asked NPCI to check if WhatsApp's payments service conforms with the RBI rules and data security of customers.
They added that NPCI has been asked to check that all compliances are in place before the US-based messaging app is allowed to scale up its services.
WhatsApp had stated that sensitive user data such as the last 6 digits of a debit card and UPI PIN are not stored at all.
While it admitted to using the infrastructure of Facebook for the service, it asserted that the parent firm does not use payment information for commercial purpose.
"Facebook processes UPI transaction data as a service provider for WhatsApp, and does not use WhatsApp payments transaction data for commercial purposes," the spokesperson had clarified.
Concerns have been growing around security of consumer data on various online social media platforms, especially after the data breach incident at Facebook where data of about 87 million users are harvested illegally by data analytics and political consultancy firm Cambridge Analytica.