Citi® Diamond Preferred® Card Invitation Code: How to Use It
If you have a Citi® Diamond Preferred® Card invitation code, you can use it to access the offer associated with your invitation and begin the application process. You'll generally need both the invitation code and your last name to retrieve the offer.
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Where to Find Your Citi® Diamond Preferred® Card Invitation Code
Your invitation code should be identified on the offer you received. Look for wording such as Invitation Code, Invitation Number, or a similar reference to the offer. Enter the code exactly as it appears, including all letters or numbers.
If you received the offer electronically, check the email for the invitation information. If you have a printed offer, look carefully around the area where Citi identifies the special offer or application instructions.
How to Use the Invitation Code
Go to the website address provided with your Citi offer. Enter your Invitation Code and your Last Name in the appropriate fields.
Make sure your last name matches the name associated with the invitation. Then select the button provided to continue. If the information is accepted, you'll be taken to the next step of the application process.
What If You Don't Have an Invitation Code?
If you don't have a Citi® Diamond Preferred® Card invitation code, or you simply prefer to apply directly, you can use the link below to check the available offer.
➤ Check the Citi® Diamond Preferred® Card Offer
This gives you another option without having to locate or enter an invitation code.
Having Trouble With Your Invitation Code?
If your Citi® Diamond Preferred® Card invitation code isn't being accepted, check that you entered every character correctly and that your last name matches the invitation. Also make sure you're using the website address provided with your offer.
If the code still doesn't work, see our guide on what to do when a Citi® Diamond Preferred® Card invitation code isn't working.
Citi® Diamond Preferred® Card
- 0% Intro APR on balance transfers for 21 months and on purchases for 12 months from date of account opening. After that the variable APR will be 16.49% - 27.24%, based on your creditworthiness. Balance transfers must be completed within 4 months of account opening.
- There is an intro balance transfer fee of 3% of each transfer (minimum $5) completed within the first 4 months of account opening. After that, your fee will be 5% of each transfer (minimum $5).
- No Annual Fee - our low intro rates and all the benefits don't come with a yearly charge.
- Buy now and pay later. Split your payment for eligible purchases of $75 or more into a fixed payment with Citi® Flex Pay.
- Get free access to your FICO® Score online.
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FICO® Credit Scores
A FICO® Score is a proprietary credit score created by the Fair Isaac Corporation (FICO). About 90% of top U.S. lenders use it to make lending decisions.
FICO® Score Ranges:
- Exceptional: 800–850
- Very Good: 740–799
- Good: 670–739
- Fair: 580–669
- Poor: 300–579
FICO categorizes scores as Poor, Fair, Good, Very Good, and Exceptional.
What is a Credit Score?
A credit score is a three-digit number (300–850) predicting your creditworthiness. Lenders use it to evaluate risk and determine rates and terms for credit.
Why it matters: A higher score can help you qualify for loans and lower interest rates. A lower score can lead to higher borrowing costs or application denials.
FICO® Credit Score Facts
- Three-Digit Number: Summarizes your credit risk.
- Range: 300–850; higher scores = lower risk.
- Data Source: Uses your credit reports from Experian, Equifax, and TransUnion.
- Industry Standard: Lenders rely on FICO for mortgages, auto loans, and credit cards.
Note: Credit scores reflect your creditworthiness but do not guarantee approval for any credit product.
Security Notice: All participating issuers use secure application systems protected by Transport Layer Security (TLS) encryption to help protect your information.
*See the online credit card applications for details about terms and conditions of credit card offers. Reasonable efforts are made to maintain accurate information. However all credit card information is presented without warranty. When you click on the " Apply Now " button you can review the credit card terms and conditions on the credit card issuer's web site.
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