أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
<p>I think just important for trading with unknown person is self confidence and knowing of your field .</p>
make sure that his credentials are correct.
try to have some post dated cheques, bank securities before delivering of products on credit to minimize the chance of defaults in receipts
