Hidden Costco Benefits Revealed! Birthday Members Can Claim a 500 NTD Coupon, But Only After Enabling 2 App Settings

Costco is offering a "birthday online gift" exclusively to primary members of its Black Diamond card. During their birthday month, members can receive a 500 NTD discount by making a single online purchase of at least 5,000 NTD and entering a special promo code at checkout. This benefit was largely unknown until a member shared it in the Facebook group 'COSTCO好市多商品消費心得分享區,' sparking widespread discussion among members. The original poster urgently reminded birthday members to check their email inboxes to avoid missing out.

Every primary Black Diamond cardholder is eligible. A single purchase of 5,000 NTD or more during the birthday month qualifies for the 500 NTD discount. According to Costco's official website, this birthday coupon is only available to primary cardholders; supplementary cardholders are not eligible. The exclusive code is typically sent via the email address linked to the member's account, and each eligible member can use it only once. The promo code must be used within the birthday month; otherwise, it automatically expires and cannot be carried over to the next month.

However, many members report never receiving the notification. Netizens joked, "Not knowing means losing 500 NTD; knowing means losing 5,000 NTD," highlighting how low the visibility of this benefit is. Some members, despite being primary cardholders, have never received the coupon email and suspect they may have missed a setup step.

Key to Receiving the Coupon: Complete 3 App Settings

The original poster emphasized that receiving the coupon depends entirely on app notification settings. Birthday members must complete the following three steps:

1. Open 'My Account' on the app homepage 2. Tap 'My Profile and Notification Settings' 3. Enable both 'Online Shopping Transaction Notifications' and 'Online Marketing Notifications'

Once these three steps are completed, members will receive the birthday coupon during their birthday month. The promo code is usually sent to the email address associated with the member account. Some members warn that the code may only arrive in the registered email inbox and not appear in the app messages, urging birthday members to carefully check their email. After seeing the reminder, many realized why they never received the coupon and expressed gratitude, saying, "Thank you so much—I had no idea this benefit existed."

Online Use Only—Cannot Be Combined! Not Valid at Physical Stores or Gas Stations

The coupon is valid only on Costco's online shopping website or app and cannot be used at physical warehouse locations, food courts, or gas stations. Additionally, the coupon cannot be applied toward the annual membership fee, cannot be combined with other promotions in the same order, and is non-refundable for cash. If an order using the coupon is fully canceled or fully returned, the coupon is considered void and will not be reissued. These restrictions are critical for members to note.

After the post went viral, members who had already used the coupon began sharing their experiences. One member said, "Already used it—the Black Diamond annual fee is instantly one-third reimbursed." With the 648 NTD annual fee and a 500 NTD birthday discount, members save nearly 1,000 NTD, making it a highly valuable perk for long-term members.