Your online agreement shows what payments are due and when.
To make a secure payment click on the 'Pay Now' button and specify the amount you wish to pay. You do not need a PayPal account : anyone can pay by credit card.
They notify us of each payment, which is direct into our Paypal secure merchant account. We can return your deposit most simply by issuing a Paypal refund.
That is a transfer directly into our bank account which is identified in your online statement.
This does save us 3% fees, but we will need your bank account details (or IBAN) to refund your security deposit.