Your first course of action should be to tighten screws -- the wall plate screws, though they aren't likely to be the problem, and the mounting screws that attach the receptacle to the electrical box.

Fill in the blanks with the appropriate answer. In accordance with Sec. 406.5 of the 2014 Edition of the NEC, receptacles shall be mounted in ______ boxes or _______. Article 406 covers the rating, ...

Finally, if the outlet mounting box is loose, Skelly recommends calling in a professional, ‘They will need to break the old box out, and replace it with a new box.’ ...

An even better option is to have a package of receptacle mounting spacers. That’s right — there’s a product made just for this problem. The spacers go on the mounting screws (between the box and the ...