أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
Bassam I answered this as a "comment" on another question, I hope you read it, apologies.
A contract may include certain terms for you to agree to accept that job offer. hence you sign a written agreement. it may include terms of Resign /Termination etc.
whereas in a simple job offer u may not bound to agree all terms or sign a written agreement.