Dear Sir,
In my view, in this scenario, a person who receives the payment is service provider (supplier) and who makes the payment is the service receiver. Repair, re-painting etc. both will be covered under 'liquidated damages'. It is classifiable under Service Accounting Code Heading No. 9997 (other services, nowhere else classified). Notification No.11/17-CT(Rate) dated 28.6.17 (as amended) and serial no. 35 refer.
Also see Schedule II, Entry No. 5, Clause (e) of the CGST Act, 2017, the relevant portion is reproduced as under :
“agreeing to the obligation to refrain from an act, or to tolerate an act or a situation, or to do an act;”
The outgoing tenant has made the payment for the repairs, repainting etc. Thereafter, the landlord gets the repair etc. done or not from any person; that is not relevant. This service is covered under Schedule-II at serial no.5 (e) read with above notification.
If we read above conjointly, such amount is taxable de jure.
In case the landlord/assessee can prove that such amount is compensation and not income, then that person has the basis for fighting the case in the court.