Once the product or service has been sold, in theory your role ends. In a large IT company or software house, post-sales specialist then take over.
Followup the outstanding payments.
MUST HAVE OWN CONVENCE
Nedo Corporation is one the leading company in Time Attendance/ Access Control Products and Multimedia Projectors in Pakistan. Nedo Corportation deals in CCTV and surveillance solutions and Civil surveying instruments also.