Store the receipts of your most important purchases in your wallet:  this way, they will always be available to you in case you need them... especially if guarantees are involved! 
Scan the receipts you want to save and adapt them for a smart display. Edit your information, such as the date of purchase, and you will be notified when your warranty expires.
 
                                           
                         
                             
                             
                             
                 
             
                                       
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                               
                                              