The only requirement for your visa/residence permit to be used as a supporting document is that it should be still valid (by date) by the time you enter Oman. Previously used or unused single entry visas are accepted as long as their validity date covers your entry date to Oman. Please note that e-Visas of other countries are not accepted as a supporting document.
The supporting document is the visa or residence permit from Schengen Area (Austria, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland) or Multi-Entry visa from UK, Australia, US, Canada and Japan.
The following countries are required the visa or residence permit:
For any assistance, please call 24h professional support center below or send an email to firstname.lastname@example.org
United States: +1 315 277 2299
United Kingdom: +44 161 298 3979
Australia: +61 7 3102 3979
South Africa: +272 1 813 9179