Since I have power of attorney for my husband, can I sign for him in that capacity?

Signing as POA should be easy, but I think I would want to chat with the Attorney who drew up the POA to be sure you can sign as POA for whatever it is that needs your hubby signature and yours.

If the Attorney says it is ok, I would bring along the Power of Attorney in case the Notary wants to see it.

freqflyeer to answer your question we have something that needs both our signatures and I wondered if I could sign for my husband as his POA and then noting that I am doing so.. I am not putting any assets into my name

Number one, you are not a Notary Public.
Number two, if the person is unable to understand what they are signing, a Notary will NOT accept their signature.
And as previously stated, you cannot sign a POA appointing yourself or putting any money or assets in your name. That is a "conflict of interest"

Weeone, we are a bit confused. Do you already have a Power of Attorney and want to make a new one? If yes, that can't be done if your husband is unable to understand what he is signing.

Or is this something else that needs signing that needs both your signatures, and you are wondering if you can sign for your husband as his Power of Attorney? If yes, yes you can sign for your husband noting on the document that you are his Power of Attorney.

I'm not really sure how this would be done though as I haven't experienced it, so these are just suggestions based on how I think it would be handled.

This is something you should ask your attorney so his consent to the POA is legally handled. An attorney could, for example, change the acknowledgment in the POA to reflect that he's unable to sign and that either an "x" or your signature as his proxy would be used.