A lot of countries possess a mechanism that will let the holder of a visa apply for a visa extension. For instance, a visa holder can apply to the Danish Immigration Service in Denmark for a Residence Permit following their arrival in the country. On the other hand, applications can make to the UK Border Agency in the United Kingdom. However, either for the reason being that the country does not have a mechanism to prolong visas or most likely for the fact that the holder of the visa is using a short stay visa to live in a particular country, it is not always possible for the holder of the visa to do this in certain circumstances.
The holder of the visa in such cases frequently engages in what is called a visa run, leaving the country for a short duration just before the granted length of stay runs out to start all over again. On the other hand, entry can be denied by immigrations under these circumstances, most especially if done more than once since such acts may signify that the foreigner aspires to reside permanently or work in that country. In addition, several countries may leave limits concerning how long you can stay in the country devoid of a visa, which further creates an obstacle to the visa runs.
Visas in general offers non-citizens permission to enter a particular country and stay there in specified constraints, including a limit on the time spent in that country, a time frame for entry and a prohibition against employment. However, being granted a visa or being in possession of a visa is never in itself an assurance of entry into the country that granted such visa, and a visa can be cancelled at any time.
Application for visa well in advance of the arrival of the applicant in the country of visit gives that country the opportunity of considering the circumstance of the applicant, like reason for applying, financial security as well as details of previous visits to the country. Upon arrival at the border of the country of visit, a visitor may be subjected to undergo and pass health and security checks.
Nevertheless, there are circumstances when your application for visa may be refused or denied. Few of such situations are; that applicant has committed misrepresentation or fraud in his or her home country of application, has a criminal record or pending criminal charges, is considered to be a threat to national security, cannot show that he has strong ties to his current country of residence, intends to reside or work permanently in the country she/he will visit without applying for an immigrant or work visa respectively, does not have a lawful reason for the journey, does not have travel arrangements such as lodging and transport in the destination country, does not have a valid health or travel insurance for the destination and the length of stay, does not have a good moral character or he is applying on excessively short notice.
Other reasons for visa refusal are that; if the applicant has no visible means of sustenance, had his or her previous visa application(s) rejected and cannot justify the reasons for the previous denials, is a citizen of a country to which the destination country is intimidating, has previously visited, or intends to visit, a country to which the destination country is hostile, has a communicable disease like tuberculosis, has previous visa/immigration violations, has a passport that will expire very soon, didn’t use a previously issued visa at all without a legitimate reason, for instance a trip cancellation due to a family emergency) as well as failure to demonstrate intent to return – for non-immigrants.