Many of us load our emergency contact’s info into our phones under “ICE” (in case of emergency) so that first responders know who to contact in the event that we are incapacitated.
I would like to suggest that you consider including your pet sitter’s information either in the note field of your ICE contact, or as a separate ICE contact, if you have not already done so. This wikipedia article points out that you can designate multiple ICE contacts, and also provides some good tips on how to make sure the ICE contacts on your phone are accessible to first responders even if the phone is locked.
I typically ask my pet sitting clients to notify me once they have returned safe and sound from their vacation, but I know that it’s easy to forget to do this. Having your pet sitter listed as one of your emergency contacts just adds an extra layer of insurance that your pet sitter will be able to continue caring for your pets in the event that you are incapacitated and unable to request it.
If the suggestion above doesn’t work for you, please make sure that your primary emergency contact has your pet sitter’s contact info.
Thanks for your consideration, and may your ICE contact never need to be utilized!