Start with the imprint text
Write down exactly what should appear on the stamp. For a company this may include its name, address, tax number, phone or email, depending on the purpose.
Use a good-quality logo
A tiny image taken from a screenshot may not reproduce well as an imprint. If you have a vector file or a larger original, send that version.
Think about the size
More text needs more surface. If the stamp must fit a specific form field, mention that before the layout is prepared.
An old stamp can be a useful reference
If the new one should keep a similar layout, bring the old stamp or a clear impression of it. See the current service details on the Stamps page.