We are pleased to accept your proposal on the indicated terms.
'Condizioni' = con-di-TSYO-ni; the 'zi' is pronounced 'ts'.
Use to formally accept a business proposal, quote, or offer in writing, creating a record of the acceptance.
'Siamo lieti di' (we are pleased to) is the formal corporate way to express acceptance positively. 'Alle condizioni indicate' (on the indicated terms) is important legally — it signals that you accept the specific terms as stated, with no implicit changes.
Confermiamo la nostra accettazione della proposta.
We confirm our acceptance of the proposal.
More bureaucratic; used in official tenders
Accettiamo la sua offerta.
We accept your offer.
Short and direct; fine for simple transactions
Siamo d'accordo con le condizioni proposte.
We agree with the proposed conditions.
Signals agreement rather than formal acceptance
In Italy, a verbal acceptance confirmed by email is often treated as binding, even before a signed contract. Be careful about expressing acceptance informally — 'ci siamo quasi' (we're nearly there) is not an acceptance.