Sunday on April, 13-14. I went to a high limit baccarat room at about 3-7:15am, (4+ hours of play). Then I \"color up\" chips. Within 4 hours I had \"color up\" chips. total $10,750 chips. I was tired and did not cash out then went back hotel room to rest up. That afternoon (Sunday the 13th of April). I went to a different Casino called Wynn Casino to watch a show. Before the show started in that Casino. I asked the dealer if I can play the chips that I used in the other Casino because I didn't have cash in my pocket. The dealer said I could cash out. The dealer also said to me that I need to go to the cashier to cash out. I went to the cashier and ask for sure if they accept these chips. The cashier said they accept these chips from Aria Casino. The cashier called by phone to Aria Casino to verify the chips for about a 15 minutes. After the phone call, the cashier told me to go back to Aria Casino to cash out. The cashier offered me to cash out my two $25 chips here. I told them I didn't want to cash it here. The next day at 8 pm ( Monday, April, 14-14). I went back to where I stayed at (Aria Casino) to cash out from the chips I played before. Some manager told me that I cannot cash out with these chips. I asked why I couldn't cash out. In reply, the manager told me that I couldn't cash out because that manager said that he did not see me play at Aria that Sunday morning. I called my friends that I went playing that Sunday morning to give that proof that I did play. My friend came and talk to the manager and still didn't believe it and told me that I still couldn't cash out. Then another manager Jennifer came up to fine out what's going on. She asked if I had tried to cash out at the Wynn Casino Sunday night. I told her yes, she was very upset when she asked me that. Jennifer told me that she saw me buy chip about 1-2 grand to play, but didn't see me \"color up\" Jennifer asked if I remember if I had  \"color up\" at that time. I said that I didn't remember. I straight up told her that I played 4 hours which is from 3am -7:15am and asked her to check the cameras from around that time I gave her. At first she said that she won't check the cameras. Jennifer asked if I remember the time I play, then she will check the cameras. So my friends was also with me and help me try to remember really hard what time I had \"color up\". I told her Jennifer that  about 4-5 in the morning I had \"color up\". Jennifer went to check, but she still didn't see me play there. Jennifer asked me one last time to really remember what time I had \"color up\" or she won't check anymore. So  I asked Jennifer since I can't cash out anymore can I still use these chips to play. In reply, Jennifer said I still use these chips, but cannot cash out. So I went back to my room with my friends to really remember what time I had \"color up\" because again she told us to really remember one last time or she won't check anymore. My friends and I really try to remember, but nothing came out of out minds to what time I had \"color up\". Then I called all my friends to tell them about my story. After I talk with all my friends. We went back to the cashier and try to cash out again. The cashier called the manager Jennifer. Jennifer asked me why did all of  my friends went with me and came all at once this time because it's all going to be the same story. My friends asked Jennifer if these are the chips are actually from this Casino and she approved that these chips are from this Casino, Aria. Jennifer keep saying that she still didn't see me play. My friends asked Jennifer  to check the cameras to see if I did play which she says it may take about 4 hours. She asked to give her some time to take a look at the cameras. I agree to give her time to take a look at it over. After at about 4 hours period of time she called me and say that she still didn't see me play. So now all I can think of is to call the police. At about 2:30am, I use the phone at the hotel where I stayed to call the police. Security of the Aria hotel came instead of the police. I ask the security why did they came instead of the police. The security asked if anything is wrong. So anyways I told them same story. I said that if this problem cannot be solve then I will just have to call the police and the news to tell them my story. The security took photos of all of my chips, myself and my friends for evidence. Security asked that if they can cash out my chips, then will I still call the police and the news. I reply, if security can cash out my chips then I will not call. The security asked me to give them an hour to solve this problem then they will call me back. About 1 hour later there's another person called me to ask me to come down to the cashier to cash out. I'm really angry and frustrated about all this happening at this Casino. I can't imagine what kind of Casino this big would do something like this. I've gambled at other different Casinos for years, but never seen a Casino like this.