Like any other collectible, sports jerseys have separate markets. One for the original jerseys and another for its replicas. Since these markets are fused together, people find it difficult to find out which jersey is authentic and which is not. Besides this, there are various types of jerseys available in the market and each type is not duplicated the same way. Different rules are followed to identify the original patterns of jerseys from the fake collection. NFL jerseys are the most popular jerseys having high demand in the market. Since the demand of NFL jerseys has increased, many companies have started to provide NFL replica jerseys at cheap rates. To find out authentic NFL jerseys, take a look in the patches and at the numbers featured in the jerseys. If the jersey is original and authentic, the numbers will be sewn on. This rule is not only applied to the border numbers but also to the entire numbers. Authentic NFL jerseys will have some sort of shadowing numbers. Replica NFL jerseys will have the similar shadowing along with an additional black border around the rest of the numbers. Such shadowing number will also be screen printed. NFL jerseys with stitched number are seemed to be expensive. This is the reason why it is joked that the more costly your jersey, the more authentic it is. Than replica NFL jerseys, authentic NFL jerseys come in vibrant colors and patterns. Anyway, it is quite difficult to check for replica and original NFL jerseys since replica looks very decent when it is not directly compared to the original. If you find the color a bit flat, it is the first red flag to proceed with caution. If you fail to find the replica, check the official logo of NFL. All official jerseys will include its company logo as a sign of legitimacy. Generally NFL jerseys are available at respective official stores.