Her notarized signature is not necessary. We just went through this process. I wouldn't have her bother with Philippine local bureaucracy. Your concern about not being there is justified depending on the local notary.
They have a fillable form on their website, All I had to do was fill out the ROM form, print and have it notarized and sent in supplemental information. More in this thread:
Only apostilled document you need is the marriage cert from utah.