Thanks for all the responces.
Maybe this is the wrong place to post such a question. Nevertheless, a one week notice to pay three months of rent is a bit unfair (in my opinion).
Just a month ago new contracts were sent out. The same contracts we have been getting for three years. With the option to pay monthly listed. It was time for renewal.
Then three weeks later this new letter arrived March 24, with a bill due April 1st. No more monthlies only quarterlies, semi-annually or annual.
I filled out the new contract and mailed next months rent check to them postmarked the 20th, the same time there letter was in the mail. Im not sure if they will accept it.
Going by in the morning, have a UPS package to pick up. See what happens.