Last week, I did a HazMat shop and on my way out did a SSK shop. I didn't see anything in the guidelines to indicate that that was not allowed. The SSK shops do not state any timing requirements other than being able to access the SSK. Both shops were accepted, so I think that there are indeed not any timing / waiting requirements. I did an SSK today (Sunday) and apparently the machine was out of the "large" piece of paper. It would only allow me to buy up to 5 stamps, and each printed on a small piece of paper without any pretty pictures.
Edited to add: I think that they pretty pictures are per-printed on the sheet of paper and only the validation is added at the time of printing. Has anyone purchased 8 or fewer stamps and gotten two or more "not valid for postage" "stamp"?
Shopping Southeast Pennsylvania, Delaware above the canal, and South Jersey since 2008
Edited 1 time(s). Last edit at 05/22/2016 10:13PM by myst4au.