Can SSR requests be modified after being submitted?

The option indicating that SSR requests can be modified by contacting Ryanair customer support is correct because it reflects the operational procedures typically in place for handling requests related to special services. Airline policies often allow for changes or updates to requests if passengers reach out to customer support, ensuring that the airline can accommodate their needs effectively. This flexibility acknowledges that circumstances can change, making it essential for customers to have a way to modify their requests accordingly.

The other options present limitations that may not align with the typical customer service policies or the operational capabilities of an airline. For instance, stating that requests are final once submitted disregards the importance of customer support in managing travel plans. Similarly, restricting modifications to instances with proof of necessity or only allowing changes through a specific app could hinder the customer experience by making the process unnecessarily complicated.