Packing slip border box for text

[uncommonlich]

Hi,

I'm new to ShipStation and I'm trying to print the return policy in the packing slip footer with a border box. I tried with the following code and no border box appears. 

Spoiler

<p  style="border-style: solid; border-width: 0.5px"> Return Policy </p>

I don't know why it isn't working. Could someone point me in the right direction?

[teamLA]

Return Policy in brackets  [Return Policy]