The debentures could be considered to be specially creditable and backed up by assets if the organization issuing them pledges property worth exactly the same as the amount quoted in the proposal. All the activities are performed keeping in mind the fact that holders need to be provided with a certain amount of assurance, which is an extra benefit so to say.
There are other factors however, which may tilt the scale in favor of the issuer. If it is found that the issuer has a clean chit regarding its treatment of the clients, past and present, as well as a uninterrupted flow of income, then the said party stands to issue debentures. It need not put its assets on the firing line itself.
Nowadays debentures are a significant amount of debts or outstanding dues in the corporate sector. The cue seems to have been taken up by governments all around, or bodies affiliated to it. They have also started issuing debentures. The example of treasury securities would be worth mentioning, in this regard. Debentures could be purchased by investors from brokers entrusted with selling them.
The debentures, being sold could be priced at say, a denomination, ranging from $1000 to $10000. The price level is calculated, based on the aspect of maturity.
The agreements are done with the benefit of securing the interests of the bondholders. The entire arrangement is made with an eye to maintain a status quo as much as possible.