Welcome to the Shopify Community and thanks for sharing your question here.
You mentioned that at this time, you do not have a passport and are inquiring whether you can upload a family member’s passport for Shopify Payments.
Your identity, address, and proof of legal entity document uploads must be reviewed and matched successfully to the information on your Shopify Payments account before your business can be fully verified. Therefore, you’ll need to submit identity documents that match the information you used when signing up for Shopify Payments. We have more information on the process shared in our Setting up Shopify Payments resource.
Could you let us know where you’re located? The reason I ask is which documents we can accept varies by Shopify Payments region. If you’re unable to provide a passport at this time, I can suggest additional personal identity documents that can be submitted for verification. When submitting this information, we encourage you to use the secure upload banner within your Shopify admin.
I look forward to hearing back and learning more about your online business and goals!