Can You Do Tawaf for Someone Else?
Question

What is the ruling on donating the reward of tawaf to another person, because some people, if they see someone who is going to go to Makkah, they say to him: Do seven for me, meaning seven circuits of tawaf, and intend that the reward be for (the one who makes this request). Is that permissible or not?
Praise be to Allah.The Standing Committee for Scholarly Research and Issuing Fatwas said:
“Tawaf around the Ka`bah cannot be done by proxy, so no one can do tawaf on behalf of someone else, unless he is doing Hajj or `Umrah on his behalf , in which case he may do it on his behalf along with the rest of Hajj or `Umrah . 
And Allah is the source of strength. May Allah send blessings and peace upon our Prophet Muhammad and his family and Companions.” (Shaykh ‘Abd al-‘Aziz ibn ‘Abd-Allah ibn Baz, Shaykh ‘Abd al-Razzaq al-‘Afifi, Shaykh ‘Abd-Allah ibn Ghadyyan, Shaykh ‘Abd-Allah ibn Qa’ud) 
For more about tawaf, please see these answers: 34644 , 219227 , and 36823 .
And Allah knows best.