Depending on where you are, your employer may have been violating law if you haven't taken enough vacation (for example, Ontario) without specific paperwork and sign-offs. If true, he may be sending you off to keep some lawyers happy.
Or, if you have accrued substantial vacation and your contract allows for accrual, you're becoming a financial ticking timebomb. That's a lot of vacation pay that they will one day have to pay for. Employees who build up decades worth of vacation pay can become a real issue when they cash in.







