Zelle. It is a free, fast, safe, and easy way to send money from one account to another. Every major bank offers this service under your online account. You will need to send your money:

Name: Islamic Center
Email Address: test@abcd.io

In the memo, you can write the purpose of your donation: Masjid Operation, Sadaqah, Zakah, Fitrah, Fidyah, etc. You can send money as low as $1 to as much as you want with no fee or hassle.

Write/drop check/cash to:

Islamic Center
Address