I'm just a regular guy, but I have three best friends.

When I meet the first, he usually sends me two letters.

When I meet the second, she tends to leave me just as I am, sometimes having passed me a letter.

When I meet the third, he presents me with his final testament.

Who am I, and who are my friends?

_{Inspired by this riddle, but the solution is (almost certainly) different.}

I'm just a regular guy, but I have three best friends.

When I meet the first, he usually sends me two letters.

When I meet the second, she tends to leave me just as I am, sometimes having passed me a letter.

When I meet the third, he presents me with his final testament.

Who am I, and who are my friends?

_{Inspired by this riddle, but the solution is (almost certainly) different.}