Step 1: Rights of debenture holders.
Debenture holders lend money to the company, and in return they receive fixed interest, irrespective of profits.
Step 2: Ownership vs. Creditorship.
- Shareholders = Owners.
- Debenture holders = Creditors.
Step 3: Conclude.
Debenture holders are creditors, not owners or customers.
Final Answer:
\[
\boxed{\text{Creditors of the company}}
\]