Recovery of bad debt is a revenue receipt. Let's break down the answer into headings and HTML bullet points:

Revenue receipt:

- Revenue receipts are the income earned by a business by selling goods or services or any other operational activity.
- Recovery of bad debt is a revenue receipt as it is the income earned by the business through the recovery of the amount that was previously written off as bad debt.

Capital receipt:

- Capital receipts are the income earned by a business through non-operational activities such as the sale of long-term assets, raising of capital, etc.
- Recovery of bad debt cannot be considered as a capital receipt as it is earned through an operational activity.

Capital expenditure:

- Capital expenditure refers to the expenses incurred by a business for acquiring long-term assets such as buildings, land, machinery, etc.
- Recovery of bad debt cannot be considered as capital expenditure as it does not involve the acquisition of any long-term assets.

Revenue expenditure:

- Revenue expenditure refers to the expenses incurred by a business for the day-to-day operations such as salaries, rent, utilities, etc.
- Recovery of bad debt cannot be considered as revenue expenditure as it does not involve any expenses incurred by the business.

In conclusion, recovery of bad debt is a revenue receipt as it is the income earned by a business through an operational activity.