Can I set up invoices to expire?

[CstarksID]

Occasionally, I run into clients who do not pay their invoices within a few days of being sent. Is there an option of setting invoices to expire, instead of me obviously cancelling their invoice? I know I can cancel and not send an invoice, but it would just be nice to be able to set an all-around 48-hour expiration. 

[VanKalkerFarms]

there is not a way to make an invoice auto delete.

why would you want the invoice to delete?  If it isn't paid yet in 2 days the invoice is still valid.  just trying to understand why this would feature would be helpful.