Accompanying letter is a frequently composed document that informs the addressee about sending documents to him/her; if it is necessary to clarify or add something to the attached documents: indicate the deadline, explain the reason for delay, explain complex points, etc.; if the document to be sent has no addressing part (for example, when sending organizational, regulatory, administrative documents) or if it is necessary to fix a list of several documents to be sent. Letters of this type start with the words: “we send”, “we send”, “we return”, “we attach”.

Invitation letters invite the recipient to participate in an ongoing event. They can be addressed to specific individuals or institutions. Letters often start with the words “you are invited” or “we invite you to attend.

They explain the nature of the event, the timing of the event and how to participate.

A newsletter informs the recipient of a fact or event. Most often with the help of newsletters propagandize the activity of organizations, products and published literature.

A letter of advertisement is a kind of information letter that is sent to a concrete addressee and contains a detailed description of advertised services or products. The purpose is to encourage the addressee to use the offered services. The text of letters is distinguished by specificity, clarity and completeness of information. In such letters the address or phone number of the organization of the author is shown separately.

Letter of notification letter by its style is close to letters of invitation and newsletters. It is drafted for a particular addressee and most often is a response to a request. It begins with the words: “please inform”, “please let us know”, “please let us know” etc. and then states some facts. If such a letter is addressed to a specific person, it includes the full name of the person to whom it is sent.

An acknowledgement letter contains a notice of receipt of any dispatch (letter, telegram, transfer, parcel, goods, valuables, etc.), that an earlier document remains in force (e.g., contract, instruction, etc.). A letter can confirm a fact, an action, a telephone conversation. This type of letter begins with words formed from the verb “to confirm”.

A reminder letter contains an indication that the deadline for some obligation or event is approaching or expiring. This type of letter usually begins with the word “reminder”.

A letter of guarantee is a document that provides performance of the obligations set out in it. It usually guarantees the addressee payment or provision of something (a place of work, research, etc.).

Letters of Initiative are letters that require a response. Most of these letters express a request (proposal, request) to the addressee to address any issues.

Letters of response by their content are dependent on the nature of initiative letters, since the THEME of their text has already been set, and it remains to state the nature of the decision of the question posed in the initiative letter: acceptance or rejection of the proposal, execution of the request. The answer must always be stated in a concrete and clear form. If a letter contains a rejection, it must be well reasoned.

Commercial letters are prepared on behalf of a legal entity in the conclusion and execution of a commercial transaction.