authenticate

Every king had his own seal, which was used to authenticate his public acts.

I will begin with some anecdotes which I am myself able to authenticate.

That is all very well; but how can you authenticate your claim to the property?

To authenticate it, I have written and signed this marginal note.

To obtain a notary to authenticate the appeal was still harder.

We mark with an asterisk the titles to editions which we have been able to authenticate by various means from actual books.

As few could write, most people had to authenticate a document in some other way, for instance, by making their mark.

I give them to you that you may authenticate them and prevent anything spurious being published that might tend to defame me.

My very passport was gone, so that I had actually nothing to authenticate my position—not even my name.

Not even miracles can authenticate a religion which preaches monasticism and celibacy.