Computerised handwriting?

[Sleepy]

I agree with Amania: type the letter but sign by hand. Fake handwriting fonts will make your letter look casual instead of formal.

Typed documents are very obvious. Firstly, printer ink or toner is very different from pen ink. Pen ink shows characteristics from pressure, pen angle, paper texture, etc. Secondly, computer fonts are unnaturally consistent. Write "the" ten times by hand and you'll see some variation in letter height, shape and spacing.

If you're very, very desperate, use the fake handwriting font as a guide. Tracing the letters onto another piece of paper will eliminate the ink and robotic consistency problems.