<code>&pay=100</code> for a payment request for the specified amount (in this example 100)
<code>&pay=bookpaybookbalance</code> for a payment request collecting the outstanding balance for this booking <span style="color:#fe746c;“ >{{#fas:exclamation-triangle}} </span> If the booking is part of a group booking and there is no outstanding balance in this booking the value of the master bookings group balance will be requested.
<code>&pay=grouppaygroupbalance</code> for a payment request collecting the outstanding balance for the group booking (the default)
<code>&pay=na</code> for a request to collect credit card details without showing an amount