Within Yoursminc we consider debtors, creditors, customers, suppliers, etc. as a contact. Before you can enter invoices or expenses you will have to enter the relevant contact. We also support reading contacts from a spreadsheet or comma separated file.
From the menu, select Contacts
Press 
Enter the details of your contact, the more details you record, the more you will benefit from them later.
Press 
and the contact will be recorded. You can now use this contact to enter an invoice or expense.