From Longman Dictionary of Contemporary EnglishYours truly/YoursYours truly/Yours (also Yours sincerely British English, Sincerely yours American English) used to end a letter that begins with the title and name of the person you are writing to, for example ‘Dear Mr. Graves’ → yours
Examples from the Corpus
Yours truly/Yours• There are an awful lot of Luddites out there with computer dyslexia, including Yours Truly.• It is very important so I hope you will come. Yours truly, Hilda Passmore.• The man of your dreams has come. Yours truly is handsome, ear-nose-throat specialist, well settled in Connecticut.• A comparatively leisurely schedule of Yours Truly still entailed travelling to twenty-one cities in thirty-five weeks.• Of course it's Yours Truly that's got to dust the whole kit and caboodle!• All high tech and computers and whatnot. Yours truly won't be moving to the new premises. 