Call Chase customer service and request a merchant block on the specific website or merchant name
Ask Chase to place a card-level restriction for online purchases
Use Chase card controls in the mobile app to turn off online or international purchases if available
Lock the card in the Chase app to prevent transactions
Replace the card number if the website is using stored card details
Request a new card number if recurring or tokenized payments keep going through
Dispute any unauthorized charges with Chase immediately
Ask Chase to add a fraud alert or account note about the merchant
Remove the card from the website, browser wallets, and digital wallets
Delete saved payment methods from the merchant account
Use a virtual card or different payment method for future online purchases
Set up transaction alerts to monitor attempted purchases
If needed, close the card account and open a new one with a different number