Русско-англо-русский юридический словарь

Supplemental agreements are legally binding documents that are used to modify contracts that are already in force. This type of document is sometimes used as a means of allowing the existing agreement to remain in place with the same ending date, while adding or removing some provisions or terms to the working relationship. A supplemental agreement is often an ideal solution when there is no desire to renegotiate an entirely new contract to take the place of the current agreement. (WiseGEEK)

red clause letter of credit (L/C) L/C that carries a provision (traditionally written or typed in red ink) which allows a seller to draw up to a fixed sum from the advising or paying-bank, in advance of the shipment or before presenting the prescribed documents. It is normally used only where the buyer and seller have close working relationship because, in effect, the buyer is extending an unsecured loan to the seller (and bears the financial risk and the currency risk). (BusinessDictionary.com)

Before performing any work for a client, a consultant should have a contract, which clearly describes the work he or she will perform, what compensation will be paid, and provides legal protection for both the client and the consultant in their working relationship. To write a consulting contract, follow the steps below. (wikiHow)

Business entertainment (e.g., meals, tickets to the theatre or a sporting event) can play an important role in strengthening working relationships among business associates. (Wordlwide Gift and Entertainment Policy)