We have seen a handful of donors report issues inserting their card details into the donation form, reporting messages that say "typed card number does not match card brand" and "details do not match card type".
Examples:
#1356917: "Have tried to donate more than once but receive a message that my card number doesn’t match the card type. Don’t know what is going on here, but I am confident the information I am entering is correct. Payment method was my Master debit card, which I have previously used to donate to Wikipedia. Can’t do a screen shot without leaving my debit card details on the screen! But the message , in red, is “Typed card number doesn't match card brand”. Web address used is https://payments.wikimedia.org/index.php?title=Special:AdyenCheckoutGateway&appeal=JimmyQuote&country=AU¤cy=AUD&payment_method=cc&recurring=0&uselang=en&amount=26&utm_key=vw_1920%7Evh_1039%7EotherAmt_0%7Eptf_1%7Etime_4. Browser is Firefox and it is up to date. Device is a desktop computer running Windows 11, which again, is up to date."
#1371243: "Tried to donate $10, but your webpage does not accept the details of the card. Error message says “details do not match the card type”. Attempted entering details twice, but with the same error. I clearly hit the credit card button. The first four digits of the card are 5402, which should indicate a MasterCard. I used the Vivaldi v5.3.x web browser, and my PC is running Win 10."
#1380442: "I’d like to help, but your online site refuses to recognize my credit card number. The error message says, “Typed card number doesn’t match card brand” - which seems odd, since there’s no place to specify which credit card brand I’m using in the first place. Obviously it’s a tech glitch, because I have no problem using my Visa card for other purchases online."
#1380620: "I have tried several times to donate through the link but it just keeps giving me a message that says "Typed card number does not match card brand" even though I chose "mastercard" and I am certain my card is Mastercard."
We have followed up for more details as we have been unable to reproduce this, but donors are reluctant to share screenshots in case their card numbers are visible.
This is low level, but we'd like to figure it out - and find a workaround for donors.
Any input would be welcome!