Is the sign for 'due' the same as 'owe'?
Yes! The sign where the index finger taps the open palm is used for 'due,' 'owe,' 'debt,' and sometimes 'afford.' The specific meaning is easily understood based on the context of your sentence.
How many times should I tap my palm?
Usually, a single, firm tap is used to emphasize a specific deadline (like a 'due date'), while a double tap is often used for the general concept of owing something. Both are widely understood by fluent signers.
Does the direction my non-dominant hand points matter?
Your non-dominant hand should be in a comfortable, natural position, with the fingers pointing forward or slightly across your body. The most important detail is simply that the palm is facing straight up to receive the tap.