Here's how you can ensure copywriters receive feedback positively.

Specificity is often underrated in copywriting. The worst thing to happen is confusing your clients. Confusing them with vague comments. You want to make sure everything you say to them is clear and direct. Let them know what needs to be improved, why making a choice and more.

You're not looking to share positively, rather using hard data. The copywriter knows that it's a results based project (business). You're constantly testing pre-heads, headlines, Johnson Boxes, offers, prices, P.S.'s, colors and so on. There is no "positive" or "negative" in copy. The great writer puts out a great piece of copy in about 30 hours. You then split test until you've found the copy that is getting the most time on page, and then, the most clicks for more information or sales, and given multiple offer options, which copy is driving which offer. Do what your readers are responsive too. You'll develop your own positive as you hone your copy to profitable or highly profitable.

The copywriter is going to be successful based on a few key criteria. Staying "positive" is not one of them. You need to have been trained by quality trainers. Even in 50 hour trainings you're only grazing the surface of that writers approaches. They're probably training because what they do works. You want to get in front of 4 -7 great writers each year until your copy is essentially HPARC (high probability above replacement copy). If you really want to stay in the "stay positive" theme you can learn video writing and then the success of transcription copy vs. the video, vs. other video/transcription options. You'd really rather they watch your video, but if that isn't happening it's not real enough so they are going to text.

Discuss the strengths of the work and always consider solutions for the things that aren't working. The time to be firm is when people aren't listening or when they are ignoring brand guidelines that could harm the client relationship.

Critiquing copy is never about what is right or wrong because there aren't very many right or wrongs outside of ethics and accuracy in the field. What matters is collecting good split test data. If you're lucky enough to be working with a major corp you can usually get quality splits in a matter of a week (each day of the week sells differently, as does the last piece of copy they read prior to yours.). If someone is critiquing instead of showing your results and then bouncing off your ideas for the next pair for testing, something is not quite perfect.

Copywriters don't need a lot of feedback if they have been well trained. If they've studied the top 100 sales letters or ads of the last 25 years they will already have a big edge. In addition they should know EVERY major business they are competing with. What are they doing right that you might want to test for your projects. Copywriting should be set up for self feedback loops and mentors should be there to suggest options for testing rather than critiquing anything, because frankly if you've done the training you already know what works most of the time.. Now you're looking for the differences between the copy you are working on and what is selling for your competitors. Mentors are suggestion/idea people.

"How can you ensure copywriters receive feedback positively?" You can't. Writers tend to be moody and a little weird. Next question.