Unfortunately I must inform you that your request has not been accepted.
'Purtroppo' = poor-TROP-po; stress on the second syllable; double 'p' shortens the preceding vowel.
Use to deliver negative news politely and directly, such as a rejection, a declined request, or a cancelled order.
'Purtroppo' (unfortunately) signals that bad news follows, giving the reader a moment to prepare. 'Devo comunicarle' (I must inform you) takes responsibility for delivering the news. The passive 'non è stata accolta' distances the rejection from the sender personally.
Con dispiacere la informiamo che...
With regret we inform you that...
Corporate plural; softer emotional register
Mi dispiace informarla che...
I am sorry to inform you that...
Adds personal regret; warmer but still formal
Siamo spiacenti di comunicarle che...
We regret to inform you that...
Standard corporate rejection formula
Italian bureaucracy is well-known for its complexity. When rejecting a request on procedural grounds, always cite the specific rule or deadline — Italians expect (and sometimes legally require) a stated reason for administrative decisions.