serial number tickets that people by for guided tours

[tmat_fl]

I have a client we are setting up the AbanteCart cart for that is selling prepaid certificates for their guided tours along the beach. Does anyone know of a way to have this "product" tick off a serial number each time it is purchased so that only that person can downloaded and use the certificate and... that it can also only be used one time with that particular serial number to never be repeated?

I'm thinking that the certificate can be a PDF document that they receive via email or are able to download immediately to then print out.
Alternatively, if the certificate can be generated and emailed to the buyer as just text that they would then print out and bring with them that would work as well.

Thank you for any ideas or solutions.

[Basara]

Thank you for any ideas or solutions.

Maybe you can buy this 3rd party extension and modify it http://marketplace.abantecart.com/gift-certificates-or-gift-cards ?
Please note this is quick idea and it doesnot solve all your requirements