Pay an Invoice Pay your invoice online! Southeast Wisconsin Process now accepts Paypal payments. If you do not already have a Paypal account, you can use a credit card to pay your invoice without signing up. It's quick and easy and goes entirely through Paypal's secure servers! Invoice Number*Your invoice number is ten digits long and can be found in the upper right corner of your invoice prefixed with the letters MDN. It is also on the bottom right of your affidavit. If you are paying multiple invoices, please separate each number by a comma.Invoice amount* What is the amount listed on the invoice? If paying multiple invoices, please type the total invoice amount hereContact InfoName* First Last Email* Your receipt will be emailed hereCompany namePhone Submit This iframe contains the logic required to handle Ajax powered Gravity Forms.