Yes! This is an often more assumed problem than a real one for most travelers. Travelling to Iran will not be a problem. Most hotels, like everyone else, won’t ask or care about your relationship status. In the case that they do, it is up to individual travelers to decide how they respond but no proof of marriage is required. In the very worst scenario, you may be required to take separate rooms but this is almost unheard of, particularly for foreign travelers. But remember unmarried Persian couples are not able to get a hotel room. If you’re married to an Iranian we advise you to carry your marriage certificate with passport as proof of marriage.