Have had a Citi Diamond Preferred card since 08/2023 and never used it until 06/2024. Initially the card's limit was $9,000. Used the card once and I was notified within a week that my limit was being lowered to $1,500. Contacted customer service - no answers given. was told I would get a letter explaining why but I never received it. Made monthly payments, all on time, then paid it off completely with 1 large payment. Within 2 days of paying, I was notified that my limit was being decreased to $500. Contacted customer service and was told that they will request my limit to be raised, which was denied about 1 week later, stating I would receive a letter explaining why but have not gotten it as of yet. In the meantime, my credit rating was impacted negatively twice due to my limit being decreased. I contacted 2 different credit bureaus, both stating no late payments at all over the last 10 yrs. They also told me that my credit rating was lowered due to Citi lowering my limit, which decreased my overall credit availability. Also, one of my other credit cards had the limit increased just before Citi decreased my limit to $500. I will never use this card again or suggest that anyone applies for this card.