Definitions of non-negotiable
not open to discussion or modification; a take it or leave it offer
Mr Collins said the non-negotiable offer of £5,000 was totally unacceptable.
where the title (=ownership) of a legal document cannot be sold, exchanged, traded, transferred (=passed from one person or institution to another) or assigned (=where the associated rights and duties are passed from one person or institution to another)
The company issued both negotiable and non-negotiable debt instruments.