Numismatist noted numismatist who was not an avid collector, and King Farouk I of Egypt was an avid collector who had very little interest in numismatics. Harry Bass by comparison was a noted collector who was also a numismatist. The second group are the coin dealers. Often called professional numismatists, they authenticate or grade coins for commercial purposes. The buying and selling of coin collections by numismatists who are professional dealers advances the study of money, and expert numismatists are consulted by historians, museum curators, and archaeologists. See, for example, the International Association of Professional Numismatists (IAPN) and the British Numismatic
Collect call must agree to the charges (usually after being informed of the name of the caller) before the call can continue normally. In general, customers can configure their landline or cell phone account to block attempted collect calls. Because the name of the caller is given before charges are accepted, it is possible to communicate a simple message for free by giving an agreed-upon name or simply using the call to synchronize an action (e.g. indicating it is time to meet). This is, however, considered toll fraud and can be prosecuted, although in most cases it is probably unlikely the person