There are countries where digital signature is valid. Let us look at them one by one. But before that remember that except these countries it is NOT valid.
Countries in Europe
1. Austria
2. Belgium
3. Bulgaria
4. Croatia
5. Cyprus
6. Czech Republic
7. Denmark
8. Estonia
9. Finland
10. France
11. Germany
12. Greece
13. Hungary
14. Iceland
15. Ireland
16. Italy
17. Israel
18. Latvia
19. Lithuania
20. Luxembourg
21. Malta
22. Montenegro
23. Netherlands
24. Norway
25. Poland
26. Portugal
27. Romania
28. Russia
29. Serbia
30. Slovakia
31. Slovenia
32. Spain
33. Switzerland
34. Sweden
35. Turkey
36. Ukraine
37. United Kingdom

Countries in Asia
1. China
2. Hong Kong
3. India
4. Indonesia
5. Japan
6. Kazahstan
7. Malaysia
8. Phillipines
9. Singapore
10. South Korea
11. Sri Lanka
12. Thailand
13. United Arab Emirates
14. Vietnam

Countries in Africa
1. Cameroon
2. Egypt
3. Nigeria
4. South Africa
Countries in Americas
1. Argentina
2. Brazil
3. Canada
4. Chile
5. Colombia
6. Costa Rica
7. Ecuador
8. Guatemala
9. Mexico
10. Panama
11. Peru
12. United States
13. Uruguay
14. Venezuela

Countries in Oceania
1. Australia
2. New Zealand

Besides if you do have any questions give me a call: https://clarity.fm/joy-brotonath