Here is what the CRA considers to be "Other related income" on the T776 - Statement of Real Estate Rentals:
"On line 8230, enter the total income you received from other sources. Some examples of other income are:
Premiums and leases – You may receive an amount for one of the following:
- granting or extending a lease or sublease
- permitting a sublease
- cancelling a lease or sublease
Report all or part of these amounts as "Other related income" at line 8230."
More information can be found in this CRA publication: CRA Rental Income Guide