Enquiries
-Solicited enquiry: An enquiry made in response to the seller's advertisement and publicity.
-Unsolicited enquiry: An enquiry made the buyer's own initiative.
-Enquiry for some favor: An enquiry not about goods but about some other information,may be about some special price or some favorable terms.
-Routine enquiry:An enquiry made by an old buyer in the usual course of business.
A letter of enquiry should be:
-Straightforward,compact and courteous;
-Positive and confident in tone;
-Brief and to the point, yet clear,complete and correct.
Straightforward
Positive
Brief