It is with regret that I inform you of the conclusion of our collaboration.
'Collaborazione' = col-la-bo-ra-TSYO-ne; eight syllables, stress on the sixth.
Use when formally terminating a business relationship, contract, or partnership, while maintaining a respectful and warm tone.
Ending a collaboration in Italian professional culture requires particular care. 'Con dispiacere' (with regret) signals that the decision is not taken lightly. Keeping the tone warm leaves the door open for future collaboration and protects your professional reputation.
Le comunico formalmente la disdetta del contratto.
I am formally notifying you of the contract cancellation.
'Disdetta' is the legal term for giving notice of cancellation
A partire dal [data], non saremo più in grado di fornire il servizio.
From [date], we will no longer be able to provide the service.
Factual and practical; clear about the end date
Dopo lunga riflessione, abbiamo deciso di non rinnovare il contratto.
After long reflection, we have decided not to renew the contract.
Signals deliberateness; mitigates abruptness
In Italy, terminating a contract without giving proper notice ('preavviso') can have legal consequences, especially for employment. Always check the 'disdetta' clause in the contract and send the termination notice by registered mail ('raccomandata') for legal validity.