Can a notice of rent increase be sent by email or it needs to be through a notary public?

Hi,

In relation to the lease renewal - as a landlord - I had sent a notice for the increase of rent by email (noted in the contract) which is consistent with the RERA prescribed increase, clearly referencing the renewal clauses in the contract (ahead of 90 days).

That email serves as a notice specifying the lease amount in the event of renewal - the subject property is in Dubai.

My understanding is that email communication is valid and takes away the need for a notarized notice.

Appreciate your view, please.

Thank you!