Operation Manual

5
Recurring payments manual
Audience
This is a technical manual aimed at IT personnel involved in integrating merchants' systems with those at Adyen.
The latest version of this document is available here:
https://www.adyen.com/home/support/manuals.html
General tips/warnings
Defensive Programming
Adyen strongly recommends the use of “defensive programming” when integrating with the Adyen Services. This implies that
automated decisions programmed into your systems should be defaulted to non-delivery of products and services. In other words,
program your systems to only deliver products and/or services after receiving an explicit authorisation of the requested payment
and NOT to deliver in situations where an explicit rejection is not received.
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