Maintenance for the week of March 2:
• [COMPLETE] ESO Store and Account System for maintenance – March 3, 9:00AM EST (14:00 UTC) - 12:00PM EST (17:00 UTC)
Can't be.
But the tooltip always shows 0 vouchers before you open the writ.
If you want to know what's asked and the number of vouchers on the tooltip, you must open the writ (DO NOT accept it though if you don't intend to do it on that particular character).
After opening, the tooltip will show the correct number of vouchers.