The phrase "letters of congratulation" is correct and can be used in written English.
It refers to letters that express congratulations to someone for a specific achievement or event. Example: "John received many letters of congratulation after he won first place in the marathon."
Letters of congratulation poured in from unexpected sources.
Includes resumes, letters of recommendation, etc. Letters of congratulation to Cole for appointment as chairman of NCIP.
The letters of congratulation will come flooding in, the emails, tweets, royal Facebook messages with special elbow length white gloves, and so on.
"Notes: Paul Bowles 1985, Tangier (for Vanity Fair piece)" Letters of congratulation, miscellaneous publishing letters, letters regarding "Amanda" and "IT'S 6 AM, DO YOU KNOW WHERE YOU ARE".
One of the letters of congratulation that Washington received after the Atlanta speech came from a young professor named W. E. B. Du Bois, who commended him for "a word fitly spoken".
With the outcome of Tuesday's presidential election too close to call, it seemed a good idea to draft advance letters of congratulation for both President Bush and Senator John Kerry.
Letters of congratulations re appointment to Northeastern Illinois Metropolitan Area Planning Commission.
However among the letters of congratulations for your daughter's birth was yet another threatening letter.
Includes official awards correspondence, letters of congratulations, invitations to lecture, personal correspondence.
He also claimed that network anchors had sent him "letters of congratulations" on Tuesday about a meeting with lawmakers that was broadcast on television that day.
In 1910, when Cobb's teammates believed Nap Lajoie of the Cleveland Naps had ended Cobb's streak of batting titles, many were reported to have sent Lajoie letters of congratulations.
