Invoices shall be issued column by column and at one time in accordance with the prescribed time limit and order, and stamped with the financial seal of the unit or the special seal for invoices.
Nationwide, it should be said that both the financial seal and the special invoice seal can be stamped.
However, there may be special regulations in different places. For example, Shanghai must be stamped with a special invoice seal.
According to the relevant provisions of the Notice on the Uniform Use of Special Invoice Seal in Shanghai (No.1997).
From 1 July, 19971day, all taxpayers in this city will use the oval invoice special seal with tax number. Taxpayers who receive invoices stamped with special invoices or special financial seals of other shapes issued by foreign units shall not reject the invoices on this ground, and the tax collection authorities shall not refuse to deduct them. "
I suggest you consult the competent tax authorities.