I'm working on getting employment records from three workplaces (all universities, since I'm a lecturer). I've told my department chairs I'll be drafting the letters myself, to make sure all the necessary information is included. But this would mean all three letters would end up looking exactly the same in format and phrasing (unless I put in random changes specifically to avoid this). Could this be a problem? Would it make an official suspicious, or is it standard procedure to do things this way?