To make a Paypal payment in installments, simply choose Paypal as the payment method in the checkout. Log in with your Paypal credentials and, once inside your account, select the "Pay in 3 installments with Paypal" option.
Is there a cost for financing?
No, there is no cost and there is no need to send any documents. Acceptance is immediate. The payment in installments is free of interest. You will be charged the first installment (equal to one third of the amount) at the time of purchase. After 30 days, you will be charged the second installment and after 60 days, the third.
