Please note that some bank branches may require an accompanying letter as an authorisation to pay.

That would require a letter of approval from the community board.

A business visa requires a letter from the sponsoring company detailing the reason for the visit.

Comair requires a letter if the infant is 12 days or younger.

"I require a letter of introduction from an ambassador or a professor, but only well-known professors."

If you need assistance with an immigration matter, I require a signed letter.

Consultation is available by appointment and requires a letter of introduction for students.

However, it does require a letter of recommendation from the student's teacher.

There will, of course, be some operation numbers which do not require a letter to be sent: application received, for example.

Some local police chiefs disregard the "proper reason" clause and require a letter of need.