I have a sample form binder that I keep loose notary certificates in. That way when someone comes to me needing something notarized they can select the form of notary certificate that I will complete for them.
I printed out the Texas notary certificate samples from the Texas Secretary of State.
Then, I made several of each type, slid them into vinyl pockets that fit into a binder and I have them ready for those documents which need a certificate and do not have one.
How, you might wonder, do I know that something needs a notary certificate if one is not already attached?
I don't. But the clients ask for it and I show them what I have. This process is acceptable according to the Texas Secretary of State.