Shaikh Ibn ul-‘Uthaymeen (may Allah have mercy upon him) said:

“A person came to me once and I was going to al-Madinah. He said to me: “Send salutations to the Messenger of Allah (ﷺ) for me’. I said: ‘This is not correct. I said to him: ‘You send salutations upon him (ﷺ) in every prayer and your salutations are carried by one who is better than me. They are the Angels’. This is because appointing [someone] to perform acts of worship [on your behalf] is not allowed**” [Ad-Durus al-Fiqhiyyah min al-Muhaadaraat il-Jaami’iyah (1/341)]

Translated by

Faisal bin Abdul Qaadir bin Hassan
Abu Sulaymaan