Please excuse the deadly-dull data-cleansing question.

Do you know any good ways of getting subscription-type customers to update their own data other then sending them a link to a web-form which will need login details that they can't remember? I have a manager who has many customers who won't do that and she wants to send them some kind of form which they can fill in and return by email, where I extract and merge their existing data into the form, then extract it after to update their records.

Acrobat has something that does this a bit but I don't know if it does drop-downs and handles the bulk we need.

Just wondrin' on the off chance that you or your colleagues have done something like that before.

Ta.