I received a reimbursement check for $(amount) last week from your company. This was supposed to cover repairs to my (item). This is obviously a mistake as $(amount) is not nearly enough to cover the necessary repairs to my (item).
I have enclosed a copy of the...
Dear (recipient's name),
I received a reimbursement check for $(amount) last week from your company. This was supposed to cover repairs to my (item). This is obviously a mistake as $(amount) is not nearly enough to cover the necessary repairs to my (item).
I have enclosed a copy of the repair bill as well as a copy of my insurance policy. After reviewing both documents, I think you'll see that I am entitled to $(amount) more than the check I received.
Thank you for your cooperation in this matter.
Sincerely,
(your name)