#1 Enter correct details – When the Cash app refuses to add your Cash card then, you must have entered the wrong credentials. When you are registering Cash card to the Cash app then, pay attention to the card details you are entering.
#2 Check if Cash App supports your Card – Cash app invalid card number also displays when the Cash app does not support your card. For your information, the Cash app does not support all kinds of debit and credit cards. You can take assistance from Cash app support.
#3 Update Cash App – If you are using an older version of the Cash app then, the Cash app also declines your Card. To resolve this, you need to download and install some important updates or you must start using the Cash app version.
#4 Clear Cash App Cache & Data – After entering correct credentials or card details and you are still facing cash app invalid card number issue then, you must clear your Cash app cache and data.
#5 Contact your Bank – Having a conversation with your bank’s representatives can resolve this issue.
#6 Contact Cash App – You can also contact the Cash app support if you are still facing this error.
Regards,
Rachel Gomez