What is Samples of demi official letter?

Demi-Official Letter is not an actual Official Letter. It's mix with Official and Unofficial letter. Demi-Official letters vary from office to office. so, there is no specific form described. If your country/office requested you to write a Demi-Official letter, you need a sample form of a Demi-Official Letter provided by your office or your government!. I can give u here a sample form that used by most of south asian countries..

[Officaial Pad][in center align]

[Right Align]Name: Mr. A (sender)Designation:
Phone:
email:
D.O. Letter No:........................................................... Date: ....-....-......

[Left align]
Dear.../Mr..../Sir
[own hand writing]

.................................................................................................
.........................................

with kind regards
[own hand writing]

[Right align]

Sicerely yours,

[Mr. A, name with designation]

[Left align]
Name: Mr. B (receiver)
Designation:
Address:

*In bracket the instruction expressed, you don't have to write them on main letter.