the signature of a letter is called the complimentary close or ending
Signature
A signature typically goes at the end of a letter, below the closing phrase and above the printed name of the sender.
It is 'as always', but a better romantic signature to end a letter is 'love always.'
To include a signature for a letter, write your full name at the end of the letter, usually below a closing phrase like "Sincerely" or "Best regards."
valediction
closing and signature
The last part of a letter is the signature.
To end a letter to an ambassador, write Yours Sincerely. Leave three to four spaces for the signature, and then write your name.
No. Your signature is your name, nothing else. When you set your name out at the end of a letter - in type - you append the initials, if you wish to, or if the letter deserves it.
A signature should appear at the end of the letter, below everything else (although it is possible to add a post-script, which means that you had intended to end the letter but then realized that there was something else you wanted to say; in this case the signature appears before the postscript, but the postscript would usually then have its own signature or at least initials).
It is called a post script or ps.
The signature should be written at the end of the letter, near the left or right margin.