Formal:
* The lawyer proffered the document as evidence in the case.
* The ambassador proffered a peace treaty to the opposing nation.
* She proffered her resignation to the board of directors.
Informal:
* The waiter proffered me a menu with a warm smile.
* He proffered a helping hand to the elderly woman struggling with her groceries.
* My friend proffered me a piece of her delicious cake.
Figurative:
* The artist proffered his soul through his paintings.
* The poet proffered words of wisdom in her verses.
* The musician proffered a melody of hope to the listeners.
Remember, "proffer" suggests an offering that is often made in a formal or polite manner.