In business terms what's BCL

a BCL stand for bank comfort letter. Only an idiot would expose his bank account holding millions of dollars to intermediaries or a seller half way across the other side of the world-.And even if they did- It only proves that such a person has more money than sense. It does not mean he will buy the product- A Guarantee is needed for that to happen .For example, an (L/C): Showing funds and buying are two very different doctrines- In the case of Intermediaries, they have not got millions (most haven't anyway) hence how can they produce a BCL- In any case even if they could it is against all banking laws to speak about a person's account, and no bank will simply do so because of some paper which says BCL on it, produced by an intermediary via fax from another planet- Really guys..?