A letter demonstrates a special effort to express a compliment, and also provides a tangible reminder of the praise. Keep the tone personal and sincere.

Ever since you volunteered to take care of my sister's children while she recuperated from her surgery, I have admired your unselfishness.

I just want you to know that I think you are doing a terrific job.

Congratulations on getting funding for the next phase of development. You are becoming something of a legend around here.

I have learned more from you than from any teacher I have ever had.

I talked to John Doe yesterday, and he said that you did a superb job of filling in for me.

I was impressed by the way you handled the Little League team. I had no idea you were a coach.

am so proud of the way
congratulations on
did such a wonderful job
ever since you
for your unwavering support during
have taught me so much about
have had great admiration for
have had a profound effect on
have restored my faith in
how grateful I have been for
how much I admire
how impressed I have been
knowing that I could count on you
must congratulate you
of how much you have meant to
the superb job you have done
want you to know
was delighted to discover
wonder if you are fully aware of

I know that she feels comfortable leaving the children with you because of your caring, patient personality.

You always manage to meet each deadline with high quality work.

You definitely have a gift for writing convincing business plans.

You have a way of explaining things that is easy for me to understand. Not everyone has such a gift.

You have always put forth extra effort in your assignments. I really appreciate being the one who benefits this time.

You are able to motivate the young players while staying positive. We truly appreciate that quality in the leaders of our youth.

always manage to
can always count on you
composure and resolve
concern and sensitivity
cordial and helpful
deserve the very best
gave me the incentive to
handled it like a pro
have a gift for
if it hadn't been for you
not sure how you managed
particularly appreciate
patience and determination
such a flair
the way you
your patience with
your valuable expertise
your remarkable selflessness
your ability to
your willingness to
your vision of
your outstanding talent

I know she appreciates everything you do.

We are proud to have you on the team.

You have a great future in this business.

I am sure others feel the way I do.

It's great to have a colleague who will help this way.
Thank you for your kindness.

Thanks for being such a great example.

Thanks for your helpful contributions.

Thank you for helping me at this difficult time.

Please accept my sincere gratitude.

always knew that you
am confident that
are proud to
are a great friend
are an inspiration to
can always count on you
don't know what we would have done
for being there
for being such a help
for helping
for your kindness
have a great future
is much appreciated
know that you will succeed
making a great contribution
my respect and admiration
please accept
really appreciate all you've done
sincere gratitude for
such a great example
thanks for everything
to have you as part of our team

I will always remember your willingness to help me during my time of need. It takes a very special person to leave her important work on short notice and come to the aid of a neighbor. Your example is a wonderful lesson to us all. Please accept my sincere thanks.

My compliments on the way you conducted the division meeting this morning. I was surprised by the number of people who were opposed to the consolidation of our departments, but you handled the controversy remarkably well. You have an enviable ability to stay cool and help opposing parties reach agreement. It is a pleasure to work with you. Thanks for helping us all find the best solution.

When John had his automobile accident last month, many of us offered to help while he was convalescing at home. Our efforts made a difference because you took the time to organize volunteers for specific tasks on specific days. I admire your willingness, energy, and organizational abilities. Everyone in the neighborhood joins with me in thanking you for what you did. Your example has been a great lesson for us.