Law schools do not look kindly upon letters of recommendation that have been drafted by applicants. Admissions officers have stated that they can tell if an applicant has drafted his or her own letter of recommendation because it either mimics too closely the applicant’s own writing style or fails to effectively capture the point of view that a recommender inherently possesses. Professors and employers, by virtue of their position, have a perspective and a point of evaluation that is nearly impossible for an applicant to emulate. An applicant cannot completely evaluate himself objectively in terms of his intellectual ability and most definitely cannot discuss himself in a comparative manner, a quality found in the best letters of recommendation. Drafting your own letter of recommendation if a recommender asks you to is, essentially, consciously choosing to submit a weak letter of recommendation.
If a recommender requests that you draft a letter for their editing, respectfully decline and see if the recommender would consider writing one with help from you. If the recommender agrees, provide him or her with a letter detailing your qualifications with examples. This way, your recommender can see what should be included in your recommendation without you actually drafting it. If the recommender strongly presses for a draft, seriously consider an alternative recommender.
In some instances, a recommender may ask for a draft because they are unfamiliar with writing a letter of recommendation for law school. If that is the case, many college career services can provide guidelines and instructions on how to write law school letters of recommendation, and there are many excellent books available that explain how to write a recommendation for law school.