Contract 

Manage the contracts created by admin portal and sign the contract.

To sign the contract, go to contract detail -> click Sign -> draw signature and click Sign

Vendor and admin can also discuss on contract

Purchase invoice 

Vendor can create purchase invoice from purchase order or contract.

Step 1. Go to Invoices menu -> click Add New 

Step 2.  Fill in the requested details and click Save

Order Return

Vendor confirm or reject for return order