Complimentary closings in business letters, such as "Yours for more business," should be avoided as the plague.
Stock Phrases in Business Letters
There are certain expressions, certain stock phrases, which have in the past been considered absolutely necessary to a proper knowledge of so-called business English. But it is gratifying to notice the emphasis that professors and teachers of business English are placing on the avoidance of these horrors and on the adoption of a method of writing in which one says exactly what one means and says it gracefully and without stiltedness or intimacy. Their aim seems to be the ability to write a business letter which may be easily read, easily understood, and with the important facts in the attention-compelling places. But for the sake of those who still cling to these hackneyed improprieties (which most of them are), let us line them up for inspection. Many of them are inaccurate, and a moment's thought will give a better method of conveying the ideas.
"We beg to state," "We beg to advise," "We beg to remain." There is a cringing touch about these. A courteous letter may be written without begging.
"Your letter has come to hand" or "is at hand" belongs to a past age. Say "We have your letter of ——" or "We have received your letter."
"We shall advise you of ——" This is a legal expression. Say "We shall let you know" or "We shall inform you."
"As per your letter." Also of legal connotation. Say "according to" or "in agreement with."
"Your esteemed favor" is another relic. This is a form of courtesy, but is obsolete. "Favor," used to mean "communication" or "letter," is obviously inaccurate.
"Replying to your letter, would say," or "wish to say." Why not say it at once and abolish the wordiness?
"State" gives the unpleasant suggestion of a cross-examination. Use "say."