Depends on the country you have in mind. In some countries a verbal agreement before witnesses can already be binding. But in most countries a lease agreement is only binding when it has been put in writing and has been signed by the lessee.
Normally, you cannot rent without signing a lease unless you rent from someone you know who is willing to enter into this type of arrangement. You can also sublease from someone.
With a lease, there are some legal protections that are afforded to the rentor. Without a lease, you may be forced to move at a moment's notice and be without a place to live.
It depends on what you mean by a lease: if a written lease is signed by both parties for a specific term, then the terms cannot be changed without mutual consent. Even if an oral lease any changes would have to be with your consent. If you do not consent to any change of the terms of the lease you can refuse to sign it and move out.
{| |- | No, they cannot sign the lease paperwork. They can certainly move into the apartment with the permission of the parents. And if the parents or boyfriend sign the lease, there should be no problems. |}
“At the end of a term lease can the lanlord require the tenant to move out?”
That depends on what the lease says.
If you signed, the lease is binding. You don't have to move in, but you do have to pay the rent. The landlord has an obligation to try to rent the place, but until he does, you have to pay.
Generally speaking, once the lease is executed by both parties, money exchanged (rent is paid with any deposits to move in), and a key is issued to the tenant, the lease may not be changed. If the landlord later wants to change the terms of the new lease, he has the right to do so: the tenant has the right to sign or reject it and move out.
She can do so without a problem. The mother is responsible for the welfare and is giving permission.
The legality of your roommate allowing a stranger to move into their room depends on the terms of your lease agreement. Generally, tenants are not allowed to sublet or assign their room to someone else without the landlord's consent. Review your lease agreement and discuss this situation with your landlord to understand your rights and options.
No, without a written lease, the landlord can only evict the same as a month to month lease agreement (30 days) but the protections to the tenant and landlord are not stated.
No.
Nothing changes as far as your lease goes.