Greeting was somehow erased

Hi Sherrie, I am sorry to hear about your husband, I will do what I can to help. I am fairly confident on that model that if you push the greeting button, then delete it will erase the message for good. Also, if the memory power failed, then it would reset to the default greeting and erase all messages and greetings. However, if the unit has options for multiple greetings (ie. default greeting, greeting 1, greeting 2, etc., then perhaps the default greeting may have been selected, while your husbands greeting is still there but is recorded under say greeting number 1. If that is the case, you can select it to play his greeting instead of the default greeting to have it play. I would find out for you but my computer is having trouble opening the manual on the Panasonic site, so here is the link. Look under "greetings" in the index. Hope I helped. Thanks, CG http://service.us.panasonic.com/OPERMANPDF/KXTM150B.PDF