在目前的公务往来中,“函”的功能作用远未能用好用足.主要原因是有不少发文单位和受文单位,没有正确把握“函”的涵义,对“函”的认识和运用陷入了误区:一是把“函”等同于一般“便函”、“信函”,片面理解其灵活简便的特点,认为“函”有随意性,甚而怀疑“函”对办理公务的效力.二是狭隘理解“函”的行文关系,只局限于横向同级部门、单位之间告知、商洽、询问事宜的小圈子,束缚了在更大的范围内运用“函”行文. In the current business dealings, the function of “letter” is far from being used fully and efficiently.The main reason is that there are a lot of sending organizations and receiving units that fail to grasp the meaning of “letter” correctly and recognize “letter” Misunderstanding: First, the “letter” is equivalent to the general “memo”, “letter”, one-sided understanding of its flexible and easy features, that the “letter” is arbitrary, and even doubt the “letter” for the effectiveness of official business. Is a narrow understanding of the “letter” of the corpus relationship, confined to the horizontal departments at the same level, between units to inform, negotiate, ask a small group of matters, binding the use of “letter” in a larger context.