This may be carried out as a gesture of goodwill to the landlord, or where the invoice is covered as a part of the agent's services.
Navigate to Financials > Landlord deductions
From the left sidebar, select General fee with business expense
Populate the form as required setting up the amount due from the landlord/to the contractor as follows:
Fee due from landlord = £0
Amount due to contractor = Full invoice amount
Click Submit
Locate the newly added deduction
Click on the tick within the Include in ledger and statement column
The invoice will appear on Contractors > Contractor Summary. The payment will be taken from the guaranteed account without deducting funds from the owner.
When the payment clears, please assign the transaction to Category = Business and Subcategory = Cost of sales.