Attestation: start it before you think you need to
Attestation is the process of getting your documents officially recognised for use in the UAE, and it is the stage most people underestimate. Depending on your home country the chain typically runs notarisation, then your Ministry of Foreign Affairs, then the UAE embassy in your country, and finally UAE MOFA after you arrive. Degree certificates need it, and so do marriage and birth certificates if family will join you. Two hard-won lessons: it takes weeks rather than days, and it is far easier and cheaper to complete while you are still in your home country.
