Absolutely
This depends on the wording of the title. If the names on the title is listed as John Doe and Jane Doe, yes you need both signatures, unless he is deceased. If the names are listed John Doe and or Jane Doe then no you don't need his signature.
Names on title appear as either (and) (or) if the title is and then both signatures are required. if it is or then only one signature is required to modify ownership of title.
Yes, joint ownership. It can read John Doe and Mary Doe, or it can read John Doe or Mary Doe. If it it titled "and", both parties share ownership jointly and both signatures are needed to transfer title. If it is titled "or", either party can transfer the title, without the other owners consent.
yes both must appear in front of the notary before their signatures can be notarized
If the title says "and" then both people are needed to sell the car. If the title says "or" then only one of the people is needed for a sale.
No, as both signatures are needed for a passport.
In the first application for a divorce only one signature will do but finally on the final form both the wife and the husband should sign , then only will it be of value .
Technically yes they can but if both executors are named on the Grant of Probate then both signatures would be needed to cash in any assets.
Yes. A lease is a contract and to make it enforceable by either party both must sign.
In most states, it will cost between $50 and $100. Do not do it. He can drive with your permission, and if you should break up, it will still be yours. Aside from that, if you have a fully paid up car, you would go down to the DMV with him and add his name, with an "and" so that both signatures are needed to sell it.
Passport and sometimes you will be asked for authorization from both your parents with signatures