No, an invitation letter is not needed if you have a confirmed hotel booking that matches your travel plans.
Hotel booking vs invitation letter
For most tourist visas to Pakistan, a hotel booking is sufficient proof of accommodation. You do not need an invitation letter if you are staying in registered accommodation.
What authorities expect
Immigration and visa authorities mainly want to see that your stay is planned and verifiable. A confirmed hotel reservation typically meets this requirement.
When an invitation letter is relevant
- You are staying with a private host
- Your visa type requires a sponsor
- Your travel purpose is not standard tourism
Submitting both a hotel booking and an invitation letter is usually unnecessary unless your situation specifically requires it. Clear and consistent accommodation details are what matter most.