Papermaking is a process used to make stamps, and the paper used in stamp production is not the same as the paper that makes up the paper itself.
The use of the chemical formaldehyde is banned by the United States and Canada in the EU and in some parts of the US.
But in many countries it is used to produce paper that is both more durable and more effective than that produced with other materials.
The EU has since banned the use of formic acid, but in countries where it is still widely used, such as the US, the EU has restricted it.
The US has also banned the production of paper that contains formaldehyde.
The International Paper Manufacturers Association (IPMA), an industry group, said it had received complaints about the use, but did not specify what type of complaints had been received.
“We have been in touch with the US Department of Justice and they will work with us to get to the bottom of the issue,” said the group’s CEO, James J. Durbin.
However, the US state department said it was unaware of any complaints about formaldehyde, adding: “The US government takes the safety of our citizens seriously, and we support and support our European partners in this effort.”
The US is one of the most important buyers of stamps, particularly for the US Postal Service, which has been plagued by high levels of counterfeiting.
In a statement, the USPS said it would investigate the matter, but added that the USPS had “a number of policies in place to combat counterfeiting and other forms of fraud”.
In the meantime, the group has said it is working to make a voluntary pledge to ban the use “in the US and other countries” of formacids, a process that has been widely used in the industry to prevent paper from being used in stamps.
“Our goal is to ban use of any formaldehyde in all paper, including stamp papers,” the group said.
“That’s the way we get to that goal.
If we can’t achieve that goal, then we’ll continue to use alternative materials.””
The next step is to start developing a voluntary ban, which would require a two-year commitment from the US government.
That will include a full-time group of people who will work to ensure that the new paper is both stronger and more durable,” the statement added.
The group’s statements came as the European Union launched a consultation on its use of “formaldehyde free” paper, and called for the international community to support efforts to protect the environment.
The European Union is among the world’s biggest buyers of papermaking machinery, and uses a variety of paper products in its stamp production, including paper made with cellulose.
But formaldehyde-free paper is not widely used and is banned in some countries.