Data is POST'ed to backend

dataformat.md

@@ -14,11 +14,11 @@ running at the host institution
 ## First request (enrollment start)
 
 After authentication and retrieving the person-data from the home institution,
-a combination of an offering-object and a person-object is sent to the configured
-endpoint of the backend.
+a combination of an offering-object and a person-object is POST'ed to the
+configured endpoint of the backend.
 [An example of this message can be found here](https://github.com/SURFnet/student-mobility-inteken-ontvanger-email/blob/main/src/test/resources/data/requestV5.json).
 The `personId` in the data should be used for getting updated
-person information later.
+person information later and informing the home institution..
 
 ## Informing home-institution of an enrollment