So, you need an alternate way to enter the drawing. A deposit box in each branch with entry forms should solve that problem. If you are "advertising" the contest, include instructions on how to enter. If you are only mailing to customers, then a sign and entry forms in each branch should suffice.
You are not required to adversise on the front page of the local paper or on local radio or television.
Al
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Al Miller, CRCM
Opinions expressed are my own and not necessarily shared by my employer.