# Create Subscription Request
Create Subscription Requests (CSRs) are objects in our system, created automatically for correctly formed POST
requests to subscription endpoints. CSRs store data related to subscription creation: card or bank account, transactions, plan and, if the request succeeded, also subscription details.
Imagine that something goes wrong while creating a subscription. Many factors may cause an attempt to create a subscription to be rejected, such as basic validation, anti-fraud mechanisms, custom rules and so forth. You can use CSRs to analyse how the custom rules influence the percentage of accepted transactions.
For more instructions, see APIref: Get a CSR or APIref: Get the CSR list.