At/after the end of the calendar month, email the Grapevine operators (Tim Livengood, Renee Brachfeld) a report of Grapevine donations for that month. PayPal donations are the net (after PayPal fees) total of donations for the month to the grapevine.paypal@fsgw.org PayPal account. There might be donations by check in the mail, although often not.
Donations report should cause them (normally Tim) to submit an event report, which you can pay from if good W-9's are in hand. Normally there are 2 performers (“tellers”) each month. If there are missing W-9's, prod the Grapevine operators to obtain them.
For US performers, pay by mailing a check to their W-9 address, unless something different was requested.
For non-US performers, what we have done so far is: Have the Grapevine operators get them to submit an invoice for their Event Report payment amount, stating which Grapevine event they performed for.
So far, we have paid all non-US performers via PayPal, in which case they need to tell us what PayPal account to pay, normally identified by an email address. Set the PayPal payment amount to cover the PayPal transaction fee and any currency conversion fees, so they get paid the converted equivalent of their Event Report payment amount, with no PayPal fees deducted.