When writing a letter to Imam Mahdi (A), do we have to throw it in the sea? What do you do when there isn't a body of water near you?

Imam al-Mahdi
When writing a letter to Imam Mahdi (A), do we have to throw it in the sea? What do you do when there isn't a body of water near you?
Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 5 years ago

The letter to Imam Al-Mahdi (AS) can be put in sea, river, well or any water. If you have no access to any water, then it can be buried.

Wassalam.