There are two basic difficulties with getting stamps expertized by third party expertization services-time and expense. The Philatelic Foundation and the PSE take several months which, for all but the most valuable items, makes it difficult for dealers to use and irritating for collectors. Then there is the expense. Certification fees (including expenses) of  $100 or more per stamp are common. Several months ago we discovered a different way of doing this and have been very pleased with the results. William Weiss is a sixty something stamp dealer who spent his professional life running a well respected stamp auction business. In his "retirement" he runs an expertization service and it works this way-his turn around time is almost always under a week, any certificate is priced at $20 and if the stamp is not genuine much of the time Bill will only charge an identification fee of $5. Bill is great too is on quality too. We are happy we found his services and think you will be pleased if you use him. His address in Weiss Auctions, POB 5358, Bethlehem Pa 18015 and his web site is www. stampexpertizing.com.