Is Nikah Without Marriage License Valid?

Is it permissible to delay the ‘aqd (marriage contract) for a long time after the engagement?

He did the marriage contract with a girl but did not tell his parents, and he wants to do the marriage contract again in their presence

He married her then he found out that her name was false

Marriage after a haraam relationship in which there was no zina

Do the bride and groom have to be present at the wedding party (waleemah)?

He got to know a girl through the internet and he wants to marry her but her father is refusing

Is it true that a righteous man does not marry anyone other than a righteous woman?

Is it obligatory to have a wedding party?

Should he still do the marriage contract when the girl’s father has died and her mother is still in mourning?