Tessitura Merchant Services and mail order transactions.

We have begin the process of transitioning to Tessitura Merchant Services, have it up and running in Test, and as we meet and discuss, we are running into unanticipated process/workflow snags, such as, what will we do with mail order transactions that arrive with no CVV?

Since TMS requires that we be in "P2PE Only Mode", and require a CVV for any non-internet transaction, what are orgs doing with mail orders, such as season renewal forms, which may include a hand written CC (even if we ask that it not be included that way), with no CVV? In our case we receive a lot of season renewal forms that match that description.

Any tips, suggestions, etc., appreciated.