The ruling regarding hajj without a permit

What is the ruling regarding [performing] hajj without a [government-issue] permit; there are some [hajj services] groups which don’t have a [government-issue] permit – and they take along with them pilgrims who [also] don’t have a [government-issue] permit. Is such a hajj considered correct? And are these people liable for sin when they fulfill an obligation in this manner?

Slaughtering sacrificial animal has no connection with being discharged from state of ihraam

If I was performing the tamattu’ hajj, and [bought a sacrificial ticket by] paying the bank the price of the sacrifice, and they told me the slaughter shall take place on the first day of ‘Eed (10th Dhul-Hijjah) – am I thereby discharged from the state of ihraam after stoning al-jamarah [al-kubraa], the tawaaf al-ifaadhah and the sa’ee?