A customer gives insufficient explanation of the chemical raw materials to be used with equipment. A customer is reluctant to provide clear answers to commercial or technical questions that are routine in commercial negotiations. An approach from a customer usually involved in military business, e.g. a customer under control of a defence ministry or the armed forces. A customer provides an unlikely reason for the equipment request in view of the customer's usual business or technological needs. Equipment is to be installed in an area under strict security control, e.g. an area in or close to military facilities or an area that has severely restricted access.
Equipment is to be installed in a suspicious or unusual location.
Unusually favourable payment terms, e.g., a higher price or better interest rate than in prevailing market, or a lump-sum cash payment. A request from a customer for excessive confidentiality regarding final destination or details of products to be delivered. Requests for devices not usually necessary, e.g. excess spare parts, or lack of request for devices usually required. A lack of request for a performance guarantee, warranty or service contract. A lack of usual requests for technical experts' assistance or training for the installation oroperation of the equipment.