Acknowledgement letters are kind of casual thank you letters. When we recognize somebody’s help or support, we are in truth demonstrating our appreciation. A letter of affirmation fills a double need – one of a sample receipt and second of Public Relation. At the point when these letters are short and limited to simply advising about accepting a bundle, a letter itself or a notice, it gains the part of a Letter of Receipt. At the point when this letter is something other than the Acknowledgment Letter of Receipt it turns into a methods for advertising. This is more clear in the corporate world where it is an expert graciousness to do as such.