Systems and methods are provided for providing an automated validity check of transaction data postings. In one implementation, a method is provided that includes entering at least one code for specifying at least one posting to be performed for a transactional data processing operation. The method may also include starting the transactional data processing operation, sending a request to a service component for performing a validity check of the at least one code, buffering one or more posting requests resulting from execution of the transactional data processing operation. Further, the method may include sending, in response to receipt of a first signal indicative of code validity from the service component, the one or more buffered posting requests with the at least one code to a posting component.