A ticket can be raised within the support desk system requesting a change like this. Whitespace may require legal acceptance of the change from multiple parties before implementing it.  

However, it should be noted that the broker is not forced to recommend the stamps that the underwriter must use. This is an optional step for the broker.

We therefore hope that the number of times that this might occur will be much lower than expected, as the control is mostly with the underwriter. The visual format of the stamps should also help.