Bid-n-Invoice Office Cleaning is an Estimate and Invoice program for the Office Cleaning professional. No expensive forms to buy just use blank computer paper. This software program allows you to print estimates, Invoices, Work Orders, Credit/Refund statements and Past Due Notices. Flexible billing, you can Invoice customers weekly, bi-weekly, monthly or even just when needed. Set your customers up in groups to allow you to print with just one button click. Your Invoices will have that clean professional look. Add your Company name, address, phone, fax and company licenses information. You can even add your company logo. Bid-n-Invoice Office Cleaning also comes with a contract and warranty writer. Keep track of your paperwork with the automatic numbering system; each Invoice gets its own number! No more addressing envelopes, just slip the invoice in a #9 Double Window Envelope and mail it! Invoice Types available, Estimate, Invoice, Work Orders, Credit/Refund and Past Due Notice. No more addressing envelopes, just slip the invoice in a #9 Double Window Envelope and mail it! Invoice Types available, Estimate, Invoice, Work Orders, Credit/Refund and Past Due Notice.