M2 Marketplace - PayPal Integration Module - PayPal Settings - Vendor Portal
PayPal Settings For Vendors
By using the add-on the vendors can also add their PayPal e-mail by navigating to My Account → Vendor Portal → Settings → Paypal.
After the store admin sends a ready payment to the supplier (the customer has already paid to the admin), the supplier will receive a notification (the e-mail is specified in the field) about the sent payment and getting the link to the Paypal website.
If the e-mail isn't linked to PayPal, there will be a notification suggesting the supplier register and receive payments.