What is the ruling on marriage and living in an "old rent" apartment, knowing the injustice of the old rent law and the invalidity of the contract according to Sharia? And how can the suitor be informed of this reservation without being misunderstood?

If the suitor is a man of good character and religious commitment, then accepting him is preferable. However, his residence in an apartment under a perpetual lease system is impermissible. It is advisable to accept the suitor and inform him of the Shariah ruling on this type of lease, or he can refer to trustworthy scholars himself. It is expected that he will return to the truth and act upon the sayings of the scholars.