The images of suffering refugees and migrants have prompted millions of people to donate to appeals and charities tohelp.

Now a government agency has issued advice warning people to take care that the people asking for money are legitimate.

The Charity Commission warns in a note published online that any suspicions about collectors or online appeals should be reported to the Action Fraud police who investigate fraud and cyber crime.

Don't be pressurised to give to a collection immediately, the commission said. "If in any doubt, donate directly to the charity."

The commission advised: "The news is currently dominated by the plight of thousands of men, women and children attempting to travel across Europe, and finding themselves in desperate need."

Many registered charities with experience in the field are offering humanitarian aid and support. These can be found at the commission website.

Sarah Atkinson, director of policy at the Commission, said: "There are laws around collecting money for charity in public which are there to protect donors and make sure that the money raised goes to a genuine charitable cause. Follow our advice to make sure that whether you give online, by phone or in person you are giving safely."

Her10 tips for safe giving included checking the charity online and also checking the fundraiser's local authority licence and ID badge.

Other precautions include making sure that the process is secure for radio and television appeals and being careful they are genuine before responding to appeal emails.