With Stripe you're able to send a link directly to your customer allowing them to add their credit cards themselves to your Customer card in Qondor. This article is a guide for you as a Project manager, if you want to send a guide to your customer please use this article regarding adding a credit card in Qondor.
From the Customer list, click the credit card icon:
In Customer credit cards you will find the shareable link you can send to your customer. Copy the link with link icon.
Generate your email and add the link: