Two friends, both living in Gujarat, want to sign a rental agreement for a property in Rajasthan. Can they use Gujarat stamp paper for this agreement? If not, are there any exceptions that would allow them to do so in Gujarat?

No, they cannot use Gujarat stamp paper for a rental agreement in Rajasthan. Stamp duty laws are governed by the state where the property is located. There are no exceptions to this rule allowing the use of stamp paper from another state.