Neither term identifies a unique document where your readers would be assured to be familiar with the wording; i.e. different attorneys and different forms vendors might use the same label, but use dramatically different language in the document itself.
They could be synonyms and the differently labeled documents could be nearly identical. The only way to know for sure is to read and compare the samples you have in front of you.
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In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.