I am living in India and I applied for an employment visa from Kuwait. I got all visa documents now, but my old passport number is mentioned in all documents. I renewed my passport and it has a new passport number. Is there any problem in travelling to Kuwait with my existing visa?
If you have your old passport with you:
No problem. You still can use the visa as long as you bring both passports. Even if the passport is cancelled (clipped).
If you do not have your old passport with you:
Big problem, you need to visit the Kuwaiti embassy to issue a new visa.
Assume there is. Due to unobservant officials, you might be able to get away with this, but, having visa documents made out for a passport you will not be traveling with will simply mean that the visa documents will not apply to the passport you have, thus that your visa won't apply to you.