I would certainly not expect anyone to use abbreviations in any sort of business letter, which includes covering letters for job applications. I don't think there is any relaxation of the rules myself! and the letter and c.v. are what the person is judged on when considering the applications. If it's too chatty, it looks as if the applicant hasn't taken it seriously.
Emails are different, we certainly use abbreviations in them day to day, but if I were applying via email for a job, and attaching a c.v., then I would apply the same rules, no abbreviations.
I notice!



