So let's sum things up: The LOI and similar documentary terms, are non standard, confusing, and lead to ambiguity. Documentary ambiguity is referred to in trade law as a condition "The Battle of the Forms" in which confusion from contradictory and ambiguous forms and documents damages the transaction. This should be avoided. To seasoned corporate traders and bankers, using terms like "Letter of Intent" is the mark of amateurs. What you properly want is an RFQ, request for quotation, from a seller or supplier. The seller may then reply to your RFQ with a quote OR full offer if they wish.
LOI as a Source or Promoter of Undue Litigation _ Aside from the legal problem of the ambiguity and uncertainty inherent in LOI, there is yet another major problem inherent in the document, from a legal standpoint. Namely, precisely because the LOI is basically ambiguous and non_definitive by nature, the document often easily lends itself to different interpretations and understandings at the hands of different parties (or even the courts), and thus lends itself, in turn, to being a fertile source for undue litigation and legal contests for those involved with the use of that document in their transactions.