соглашение о намерениях(a letter that formally states what someone plans to do although this is not a legal promise or official contract: "The company has signed a letter of intent but the full agreement has not been finalized. CBED Alexander Demidov)
письмо о намерениях(LOI • A letter of intent is a document declaring the preliminary commitment of one party to do business with another. The letter outlines the chief terms of a prospective deal and is commonly used in business transactions.)