I don't know when the landlord said it was worthwhile to exceed the activation time. If you don't activate the card immediately after you get it, it is still possible to activate it successfully, but it depends on the specific time, usually within 3 months. The problem is not big. If the validity period of the credit card is exceeded, the application is unsuccessful, because the landlord's account has been cancelled by the bank, and I have to apply for a new one. I don't know if the landlord understands what I said. I hope my answer can help the landlord!