When does yes mean no!!!!

I had an elderly client who had signed my notary book and presented her VA ID to me.The two witnesses were present and I had determined the client know what she was doing. She then said no.Clearly yes meant no and I entered the not notarized into my book. There is a lesson here. Get the power of attorney done as earlier as possible People do age and they still have the right to say no. In this case it was a revocable power of attorney and the person requesting her to sign the document had been looking after her affairs for years.