Poppy sellers said they were "threatened by left wing idiots" while decorating a lamppost.
Volunteers from the Royal British Legion say they were subjected to abuse while working in a roundabout in Penarth, South Wales.
Eyewitnesses said volunteers faced "threats and foul language" from a small group of aggressive individuals during their work last weekend.
Mother-of-two Karen Jones said she and her husband Nick were met with aggression while working to decorate the Victorian town.
She told Wales Online: "In a small friendly town, such as ours, you do not expect Poppy Appeal volunteers to get abuse when putting up Memorial lamp post poppies and flags for the Remembrance period.
"Our volunteers were approached this morning and met with abuse and threats to come back and take the poppies and flags down.
"The Royal British Legion Poppy Appeal is not political, it is to remember the men and women who paid the ultimate sacrifice so that people have 'Free Speech'.
"Please do not hesitate to report any person attempting to take down the flags and poppies to the police."
Penarth Poppy sellers said they were hurled with abuse
|PENARTH POPPY APPEAL
Nick claimed volunteers had been "subjected to horrendous abuse by mindless left-wing idiots when putting up lamp post poppies."
He added: "What is this country coming to?"
Karen continued: "Flags and symbols are being placed around our towns and villages to recognise the people who have represented our armed forces in conflicts around the world.
"November 11 is a chance to pay tribute to those who have made the ultimate sacrifice, giving their lives for the freedoms we have today.
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The team set up their base in the centre of the town
|PENARTH POPPY APPEAL
A spokesman from South Wales Police said: "South Wales Police is currently investigating an alleged public order offence which took place on Windsor Road, Penarth on Sunday, October 26."
Britons are coming together to mark Remembrance Day, with one local community group taking matters into their own hands to flood the area with decorations.
Greener Littleover has led a coalition in the Littleover and Blagreaves area of Derby to decorate lampposts and signs in the area to the southwest of the city centre.
At the helm of Greener Littleover is Ali Davies-Marsh, who told GB News the idea came about after years of "excuses" as to why poppies were not used as decorations.
The 49-year-old NHS worker and local resident told GB News: "I felt like it was a year of excuses.
"I think last year really was the year where we went 'You've just made too many promises. You can no longer use Covid or other things as excuses or reasons why this hasn't been done.
"We had to take matters into our own hands because we got to September this year, and there was no suggestion that anything different was going to happen.
"We were also keen it wasn't one organisation taking on the job, [Greener Littleover] were heading it up because we have the contacts and we have the insurances, but we wanted to make sure it was a full community involvement and ownership."
Youth groups such as Marine Corp Cadets, 125th Littleover Cubs and 118th Witham Cubs and Scouts have come together to decorate the neighbourhoods.
The parent of one of the Cubs who helped out said: "It was moving to see our children help install the poppies, do something for the community.
"They asked questions, they listened to veterans’ stories, and they understand something of why we remember each year.”
A resident at nearby Heatherton House said: "The sight of poppies being installed by young hands brought back memories. But more than that, it made me feel part of a community that cares. That matters."