Digital Signing guidelines - NatWest

Introduction
1.1 Introduction to Bankline Direct
Bankline Direct provides a transactional gateway between NatWest and those customers who require the facility
to make payments and receive account information reports. The service supports a varied array of industry and
NatWest formats to enable simple integration into customers’ own systems.
The Bankline Direct service is scalable and flexible to meet the need of customers who wish to make single
payments transactions or multi-payment files. An extensive number of different account information reports and
payment advice notices are available, along with reconciliation and activity reporting. All reports are published
at a frequency that suits the needs of the customer.
All data exchanged between the customer and the Bankline Direct service is secure, adhering to industry
security standards.
1.2 Purpose of Technical Specifications
The purpose of this document is to provide NatWest customers with the required technical specifications to build
and use the relevant connectivity channels to communicate with the Bankline Direct service.
The following are the different types of Bankline Direct technical specification documents available
Channel Build Guidelines
Technical specifications and setup instructions for the connectivity channel between NatWest and
its customer
Digital Signature Guidelines
Technical specifications outlining the structure and format of digital signatures applied to files sent
by Bankline Direct and also the requirements for signing payment files to the service
Outward Payment Files and Messages
Technical specifications for the content and format of payment instructions; either for individual
payment messages or files containing multiple payment messages
Acknowledgements
Technical specifications for the content and format of acknowledgements sent to the customer from
the Bankline Direct service
Reports
Technical specifications for the content and format of reports and statements sent to the customer
from the Bankline Direct service
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