It's important to communicate with your supervisor beforehand, explain purpose of the recommendation, and provide them with any relevant information they may need. Ultimately, it depends on your relationship with your supervisor and your confidence in their ability to write strong recommendation.

Greetings! I can definitely recommend lor residency for writing letters of recommendation. They specialize in creating high-quality letters specifically for residency applications. Their writers have expertise in various fields and can tailor the letter to highlight your strengths and qualifications. I've used their service in the past and was impressed with the results. Compare their prices, turnaround times, and customer reviews to find the best fit for your needs. Good luck!