1. Add a group for each corporate by creating an invoice for the lead person in the corporate
2. Add members from that corporate to that group
3. Write text for Groups subscription on membership form
4. Write text for "Thankyou for your order" explaining the payment process etc, and provide online banking details
5. Check GST registration status/number
6. On corporate membership, write text something like:
"please use your company email as this will be used to automatically add you to the corporate. purchase this if you want a membership for your organisation. If your organisation is already a members, just create an account using your company email address and you'll automatically be added (without having to pay anything)
7. Add invoices for all individual members, and reset their expiry dates to those on the spreadsheet