Paypal INP responce FileContent "invalid"

i am receiving the pay-pal Ipn response filecontent "invalid" suddenly . I have implement the further proceeding on the base of "Varified " and now it is return "Invalid" for me.How and what what i have to do . payment proceeding successfully in my account.  there is some really harmful for me if I proceed further functionality and ignore this Invalid status ? i have no Idea about this. please suggest me better way for deal this issue. Thanks In advance
kausar aliweb DeveloperAsked:
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A Q ChoudaryJunior Linux EngineerCommented:
You need to contact paypal customer care ,tey are very helpful following is pay pal customer care no;
paypal customer care no: 1800 419 9833
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kausar aliweb DeveloperAuthor Commented:
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