Bond Tracking Database

I am looking at a database project that will allow me to keep track of bond and promissory note issues. Pretty basic and I would like to be able to track and distribute to a member list. It is very important for each bond and promissory note that is issued that the database will not allow duplicate registered numbers. I would also like the database to keep track of which promissory notes that are written to be subtracted from particular bond amounts until exausted. If possible I would like the database to mailmerge specific data into a preformated template bond or promissory note.